{"id":431,"date":"2023-10-25T01:57:32","date_gmt":"2023-12-10T02:46:27","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/index.php\/2023\/11\/30\/%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8web-workers%e5%a4%84%e7%90%86cpu%e5%af%86%e9%9b%86%e5%9e%8b%e4%bb%bb%e5%8a%a1\/"},"modified":"2025-08-02T07:47:04","modified_gmt":"2025-08-01T23:47:04","slug":"%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8web-workers%e5%a4%84%e7%90%86cpu%e5%af%86%e9%9b%86%e5%9e%8b%e4%bb%bb%e5%8a%a1","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8web-workers%e5%a4%84%e7%90%86cpu%e5%af%86%e9%9b%86%e5%9e%8b%e4%bb%bb%e5%8a%a1\/","title":{"rendered":"\u63d0\u5347\u524d\u7aef\u6027\u80fd\uff1a\u4f7f\u7528Web Workers\u5904\u7406CPU\u5bc6\u96c6\u578b\u4efb\u52a1"},"content":{"rendered":"<p>\u4f5c\u8005\u9009\u62e9\u5c06&#8221;Girls Who Code&#8221;\u4f5c\u4e3a&#8221;\u5199\u4f5c\u7b79\u6b3e\u8ba1\u5212&#8221;\u7684\u6350\u8d60\u5bf9\u8c61\u3002<\/p>\n<h3>\u4ecb\u7ecd<\/h3>\n<p>\u7531\u4e8e JavaScript \u7684\u6267\u884c\u662f\u6309\u987a\u5e8f\u4f9d\u6b21\u5728\u5355\u4e2a\u7ebf\u7a0b\u4e2d\u8fdb\u884c\u7684\uff0c\u6240\u4ee5\u5b83\u901a\u5e38\u88ab\u79f0\u4e3a\u5355\u7ebf\u7a0b\u8bed\u8a00\u3002\u5982\u679c\u60a8\u5728\u5177\u6709\u591a\u4e2a\u6838\u5fc3\u7684\u8bbe\u5907\u4e0a\u8bbf\u95ee Web \u5e94\u7528\u7a0b\u5e8f\uff0cJavaScript 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\u8c03\u7528\u76f8\u5173\u8054\u7684\u56de\u8c03\u51fd\u6570\u5c31\u4f1a\u5728\u4e3b\u7ebf\u7a0b\u4e0a\u6267\u884c\u3002\u56e0\u4e3a I\/O \u7ed1\u5b9a\u4efb\u52a1\u7684\u6027\u80fd\u53d6\u51b3\u4e8e\u64cd\u4f5c\u7cfb\u7edf\u5b8c\u6210\u4efb\u52a1\u6240\u9700\u7684\u65f6\u95f4\uff0c\u6240\u4ee5\u5927\u591a\u6570 I\/O \u7ed1\u5b9a\u4efb\u52a1\uff08\u4f8b\u5982 Fetch\uff09\u5b9e\u73b0\u4e86 Promise\uff0c\u5b9a\u4e49\u4e86\u5728 Promise \u89e3\u6790\u65f6\u5e94\u8be5\u8fd0\u884c\u7684\u51fd\u6570\uff1b\u4e5f\u5c31\u662f\u8bf4\uff0c\u5f53\u64cd\u4f5c\u7cfb\u7edf\u5b8c\u6210\u4efb\u52a1\u5e76\u8fd4\u56de\u54cd\u5e94\u65f6\u3002<\/p>\n<p>\u76f8\u6bd4\u4e4b\u4e0b\uff0c\u4e0e\u7b49\u5f85\u64cd\u4f5c\u7cfb\u7edf\u7684 I\/O \u9650\u5236\u4efb\u52a1\u4e0d\u540c\uff0c\u5177\u6709 CPU \u9650\u5236\u7684\u4efb\u52a1\u4e0d\u4f1a\u95f2\u7f6e\u3002CPU \u9650\u5236\u4efb\u52a1\u4f1a\u6301\u6709 CPU \u76f4\u5230\u4efb\u52a1\u5b8c\u6210\uff0c\u4ece\u800c\u963b\u585e\u4e3b\u7ebf\u7a0b\u3002\u5373\u4f7f\u5c06\u5b83\u4eec\u5c01\u88c5\u5728 Promise \u4e2d\uff0c\u5b83\u4eec\u4ecd\u7136\u4f1a\u963b\u585e\u4e3b\u7ebf\u7a0b\u3002\u6b64\u5916\uff0c\u5f53\u4e3b\u7ebf\u7a0b\u88ab\u963b\u585e\u65f6\uff0c\u7528\u6237\u53ef\u80fd\u4f1a\u6ce8\u610f\u5230 Web \u5e94\u7528\u7684\u7528\u6237\u754c\u9762\uff08UI\uff09\u53ef\u80fd\u4f1a\u51bb\u7ed3\uff0c\u4efb\u4f55\u4f7f\u7528 JavaScript \u7684\u529f\u80fd\u53ef\u80fd\u65e0\u6cd5\u6b63\u5e38\u5de5\u4f5c\u3002<\/p>\n<p>\u4f5c\u4e3a\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\u7684\u4e00\u4e2a\u65b9\u6cd5\uff0c\u6d4f\u89c8\u5668\u5f15\u5165\u4e86 Web Workers API\uff0c\u5728\u6d4f\u89c8\u5668\u4e2d\u63d0\u4f9b\u591a\u7ebf\u7a0b\u652f\u6301\u3002\u901a\u8fc7 Web Workers\uff0c\u60a8\u53ef\u4ee5\u5c06 CPU \u5bc6\u96c6\u578b\u4efb\u52a1\u5206\u914d\u7ed9\u53e6\u4e00\u4e2a\u7ebf\u7a0b\uff0c\u4ece\u800c\u91ca\u653e\u4e3b\u7ebf\u7a0b\u3002\u4e3b\u7ebf\u7a0b\u5728\u4e00\u4e2a\u8bbe\u5907\u6838\u5fc3\u4e0a\u6267\u884c JavaScript \u4ee3\u7801\uff0c\u800c\u5206\u914d\u7684\u4efb\u52a1\u5728\u53e6\u4e00\u4e2a\u6838\u5fc3\u4e0a\u6267\u884c\u3002\u8fd9\u4e24\u4e2a\u7ebf\u7a0b\u53ef\u4ee5\u901a\u8fc7\u6d88\u606f\u4f20\u9012\u8fdb\u884c\u901a\u4fe1\u548c\u5171\u4eab\u6570\u636e\u3002<\/p>\n<p>\u5728\u672c\u6559\u7a0b\u4e2d\uff0c\u4f60\u5c06\u521b\u5efa\u4e00\u4e2a\u8017\u7528 CPU \u8d44\u6e90\u7684\u4efb\u52a1\uff0c\u963b\u585e\u6d4f\u89c8\u5668\u7684\u4e3b\u7ebf\u7a0b\uff0c\u5e76\u89c2\u5bdf\u5b83\u5bf9 Web \u5e94\u7528\u7684\u5f71\u54cd\u3002\u7136\u540e\uff0c\u4f60\u5c06\u5c1d\u8bd5\u4f7f\u7528 Promises \u4f7f\u8fd9\u4e2a\u8017\u7528 CPU \u8d44\u6e90\u7684\u4efb\u52a1\u53d8\u4e3a\u975e\u963b\u585e\u7684\uff0c\u4f46\u672a\u6210\u529f\u3002\u6700\u540e\uff0c\u4f60\u5c06\u521b\u5efa\u4e00\u4e2a Web Worker\uff0c\u5c06\u8017\u7528 CPU \u8d44\u6e90\u7684\u4efb\u52a1\u8f6c\u79fb\u5230\u53e6\u4e00\u4e2a\u7ebf\u7a0b\u4e2d\uff0c\u4ee5\u9632\u6b62\u5b83\u963b\u585e\u4e3b\u7ebf\u7a0b\u3002<\/p>\n<h2>\u5148\u51b3\u6761\u4ef6<\/h2>\n<p>\u4e3a\u4e86\u8ddf\u968f\u8fd9\u4e2a\u6559\u7a0b\uff0c\u4f60\u5c06\u9700\u8981\uff1a<\/p>\n<ul class=\"post-ul\">\n<li>\u4e00\u53f0\u5b89\u88c5\u4e86\u73b0\u4ee3\u6d4f\u89c8\u5668\u7684\u53cc\u6838\u6216\u591a\u6838\u8ba1\u7b97\u673a\u3002<\/li>\n<li>\u4f60\u7684\u7cfb\u7edf\u4e0a\u6709\u4e00\u4e2a\u672c\u5730 Node.js \u73af\u5883\uff0c\u4f60\u53ef\u4ee5\u901a\u8fc7\u300a\u5982\u4f55\u5728 Ubuntu 22.04 \u4e0a\u5b89\u88c5 Node.js\u300b\u6765\u8bbe\u7f6e\u3002\u5728\u5176\u4ed6\u64cd\u4f5c\u7cfb\u7edf\u4e0a\uff0c\u8bf7\u6309\u7167\u300a\u5982\u4f55\u5b89\u88c5 Node.js \u5e76\u521b\u5efa\u672c\u5730\u5f00\u53d1\u73af\u5883\u300b\u4e2d\u7684\u76f8\u5e94\u6307\u5357\u8fdb\u884c\u64cd\u4f5c\u3002<\/li>\n<li>\u4e86\u89e3\u4e8b\u4ef6\u5faa\u73af\u3001\u56de\u8c03\u548c Promises \u7684\u77e5\u8bc6\uff0c\u4f60\u53ef\u4ee5\u901a\u8fc7\u9605\u8bfb\u300a\u7406\u89e3 JavaScript \u4e2d\u7684\u4e8b\u4ef6\u5faa\u73af\u3001\u56de\u8c03\u3001Promises \u548c Async\/Await\u300b\u6765\u5b66\u4e60\u3002<\/li>\n<li>\u4f60\u8fd8\u9700\u8981 HTML\u3001CSS \u548c JavaScript \u7684\u57fa\u7840\u77e5\u8bc6\uff0c\u4f60\u53ef\u4ee5\u5728\u6211\u4eec\u7684\u300a\u5982\u4f55\u4f7f\u7528 HTML \u6784\u5efa\u7f51\u7ad9\u300b\u7cfb\u5217\u3001\u300a\u5982\u4f55\u4f7f\u7528 CSS \u6784\u5efa\u7f51\u7ad9\u300b\u7cfb\u5217\u4ee5\u53ca\u300a\u5982\u4f55\u4f7f\u7528 JavaScript \u7f16\u7a0b\u300b\u4e2d\u627e\u5230\u3002<\/li>\n<\/ul>\n<h2>\u7b2c\u4e00\u6b65 &#8211; \u521b\u5efa\u4e00\u4e2a\u4e0d\u9700\u8981 Web Workers \u7684 CPU \u5bc6\u96c6\u578b\u4efb\u52a1<\/h2>\n<p>\u5728\u8fd9\u4e00\u6b65\u4e2d\uff0c\u60a8\u5c06\u521b\u5efa\u4e00\u4e2a\u5177\u6709\u963b\u585e CPU \u7ed1\u5b9a\u4efb\u52a1\u548c\u975e\u963b\u585e\u4efb\u52a1\u7684 Web \u5e94\u7528\u7a0b\u5e8f\u3002\u8be5\u5e94\u7528\u7a0b\u5e8f\u5c06\u5177\u6709\u4e09\u4e2a\u6309\u94ae\u3002\u7b2c\u4e00\u4e2a\u6309\u94ae\u5c06\u542f\u52a8\u963b\u585e\u4efb\u52a1\uff0c\u5373\u4e00\u4e2a\u5faa\u73af\uff0c\u8fed\u4ee3\u5927\u7ea6\u4e94\u5341\u4ebf\u6b21\u3002\u7b2c\u4e8c\u4e2a\u6309\u94ae\u5c06\u589e\u52a0\u7f51\u9875\u4e0a\u7684\u4e00\u4e2a\u503c\uff0c\u7b2c\u4e09\u4e2a\u6309\u94ae\u5c06\u6539\u53d8 Web \u5e94\u7528\u7a0b\u5e8f\u7684\u80cc\u666f\u989c\u8272\u3002\u7528\u4e8e\u589e\u52a0\u548c\u6539\u53d8\u80cc\u666f\u7684\u6309\u94ae\u662f\u975e\u963b\u585e\u7684\u3002<\/p>\n<p>\u9996\u5148\uff0c\u4f7f\u7528 mkdir \u547d\u4ee4\u521b\u5efa\u9879\u76ee\u76ee\u5f55\u3002<\/p>\n<pre class=\"post-pre\"><code><\/code><\/pre>\n<ol>\n<li data-prefix=\"$\"><span class=\"token function\">mkdir<\/span> <mark>workers_demo<\/mark><\/li>\n<\/ol>\n<pre class=\"post-pre\"><code><\/code><\/pre>\n<p>&nbsp;<\/p>\n<pre class=\"post-pre\"><code><\/code><\/pre>\n<p>\u7528 cd \u547d\u4ee4\u8fdb\u5165\u76ee\u5f55\u3002<\/p>\n<pre class=\"post-pre\"><code><\/code><\/pre>\n<ol>\n<li data-prefix=\"$\"><span class=\"token builtin class-name\">cd<\/span> <mark>workers_demo<\/mark><\/li>\n<\/ol>\n<pre class=\"post-pre\"><code><\/code><\/pre>\n<p>&nbsp;<\/p>\n<pre class=\"post-pre\"><code><\/code><\/pre>\n<p>\u4f7f\u7528 nano \u6216\u4f60\u6700\u559c\u6b22\u7684\u6587\u672c\u7f16\u8f91\u5668\uff0c\u521b\u5efa\u4e00\u4e2a index.html \u6587\u4ef6\u3002<\/p>\n<pre class=\"post-pre\"><code><\/code><\/pre>\n<ol>\n<li data-prefix=\"$\"><span class=\"token function\">nano<\/span> index.html<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code><\/code><\/pre>\n<p>&nbsp;<\/p>\n<pre class=\"post-pre\"><code><\/code><\/pre>\n<p>\u5728\u4f60\u7684 index.html \u6587\u4ef6\u4e2d\uff0c\u6dfb\u52a0\u4ee5\u4e0b\u4ee3\u7801\u6765\u521b\u5efa\u6309\u94ae\u548c\u5143\u7d20\uff0c\u7528\u4e8e\u663e\u793a\u8f93\u51fa\uff1a<\/p>\n<div>\u5de5\u4eba\u793a\u8303\/index.html<\/div>\n<pre class=\"post-pre\"><code><span class=\"token doctype\"><span class=\"token punctuation\">&lt;!<\/span><span class=\"token doctype-tag\">DOCTYPE<\/span> <span class=\"token name\">html<\/span><span class=\"token punctuation\">&gt;<\/span><\/span>\r\n<span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>html<\/span> <span class=\"token attr-name\">lang<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">=<\/span><span class=\"token punctuation\">\"<\/span>zh-CN<span class=\"token punctuation\">\"<\/span><\/span><span class=\"token punctuation\">&gt;<\/span><\/span>\r\n  <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>head<\/span><span class=\"token punctuation\">&gt;<\/span><\/span>\r\n    <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>meta<\/span> <span class=\"token attr-name\">charset<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">=<\/span><span class=\"token punctuation\">\"<\/span>UTF-8<span class=\"token punctuation\">\"<\/span><\/span> <span class=\"token punctuation\">\/&gt;<\/span><\/span>\r\n    <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>meta<\/span> <span class=\"token attr-name\">name<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">=<\/span><span class=\"token punctuation\">\"<\/span>viewport<span class=\"token punctuation\">\"<\/span><\/span> <span class=\"token attr-name\">content<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">=<\/span><span class=\"token punctuation\">\"<\/span>width=device-width, initial-scale=1.0<span class=\"token punctuation\">\"<\/span><\/span> <span class=\"token punctuation\">\/&gt;<\/span><\/span>\r\n    <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>title<\/span><span class=\"token punctuation\">&gt;<\/span><\/span>Web Workers\u793a\u4f8b<span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;\/<\/span>title<\/span><span class=\"token punctuation\">&gt;<\/span><\/span>\r\n    <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>link<\/span> <span class=\"token attr-name\">rel<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">=<\/span><span class=\"token punctuation\">\"<\/span>stylesheet<span class=\"token punctuation\">\"<\/span><\/span> <span class=\"token attr-name\">href<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">=<\/span><span class=\"token punctuation\">\"<\/span>main.css<span class=\"token punctuation\">\"<\/span><\/span> <span class=\"token punctuation\">\/&gt;<\/span><\/span>\r\n  <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;\/<\/span>head<\/span><span class=\"token punctuation\">&gt;<\/span><\/span>\r\n  <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>body<\/span><span class=\"token punctuation\">&gt;<\/span><\/span>\r\n    <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>div<\/span> <span class=\"token attr-name\">class<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">=<\/span><span class=\"token punctuation\">\"<\/span>wrapper<span class=\"token punctuation\">\"<\/span><\/span><span class=\"token punctuation\">&gt;<\/span><\/span>\r\n      <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>div<\/span> <span class=\"token attr-name\">class<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">=<\/span><span class=\"token punctuation\">\"<\/span>total-count<span class=\"token punctuation\">\"<\/span><\/span><span class=\"token punctuation\">&gt;<\/span><\/span><span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;\/<\/span>div<\/span><span class=\"token punctuation\">&gt;<\/span><\/span>\r\n      <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>div<\/span> <span class=\"token attr-name\">class<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">=<\/span><span class=\"token punctuation\">\"<\/span>buttons<span class=\"token punctuation\">\"<\/span><\/span><span class=\"token punctuation\">&gt;<\/span><\/span>\r\n        <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>button<\/span> <span class=\"token attr-name\">class<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">=<\/span><span class=\"token punctuation\">\"<\/span>btn btn-blocking<span class=\"token punctuation\">\"<\/span><\/span> <span class=\"token attr-name\">id<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">=<\/span><span class=\"token punctuation\">\"<\/span>blockbtn<span class=\"token punctuation\">\"<\/span><\/span><span class=\"token punctuation\">&gt;<\/span><\/span>\u963b\u585e\u4efb\u52a1<span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;\/<\/span>button<\/span><span class=\"token punctuation\">&gt;<\/span><\/span>\r\n        <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>button<\/span> <span class=\"token attr-name\">class<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">=<\/span><span class=\"token punctuation\">\"<\/span>btn btn-nonblocking<span class=\"token punctuation\">\"<\/span><\/span> <span class=\"token attr-name\">id<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">=<\/span><span class=\"token punctuation\">\"<\/span>incrementbtn<span class=\"token punctuation\">\"<\/span><\/span><span class=\"token punctuation\">&gt;<\/span><\/span>\u9012\u589e\u8ba1\u6570<span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;\/<\/span>button<\/span><span class=\"token punctuation\">&gt;<\/span><\/span>\r\n        <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>button<\/span> <span class=\"token attr-name\">class<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">=<\/span><span class=\"token punctuation\">\"<\/span>btn btn-nonblocking<span class=\"token punctuation\">\"<\/span><\/span> <span class=\"token attr-name\">id<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">=<\/span><span class=\"token punctuation\">\"<\/span>changebtn<span class=\"token punctuation\">\"<\/span><\/span><span class=\"token punctuation\">&gt;<\/span><\/span>\r\n          \u66f4\u6539\u80cc\u666f\r\n        <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;\/<\/span>button<\/span><span class=\"token punctuation\">&gt;<\/span><\/span>\r\n      <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;\/<\/span>div<\/span><span class=\"token punctuation\">&gt;<\/span><\/span>\r\n      <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>div<\/span> <span class=\"token attr-name\">class<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">=<\/span><span class=\"token punctuation\">\"<\/span>output<span class=\"token punctuation\">\"<\/span><\/span><span class=\"token punctuation\">&gt;<\/span><\/span><span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;\/<\/span>div<\/span><span class=\"token punctuation\">&gt;<\/span><\/span>\r\n    <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;\/<\/span>div<\/span><span class=\"token punctuation\">&gt;<\/span><\/span>\r\n    <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>script<\/span> <span class=\"token attr-name\">src<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">=<\/span><span class=\"token punctuation\">\"<\/span>main.js<span class=\"token punctuation\">\"<\/span><\/span><span class=\"token punctuation\">&gt;<\/span><\/span><span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;\/<\/span>script<\/span><span class=\"token punctuation\">&gt;<\/span><\/span>\r\n  <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;\/<\/span>body<\/span><span class=\"token punctuation\">&gt;<\/span><\/span>\r\n<span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;\/<\/span>html<\/span><span class=\"token punctuation\">&gt;<\/span><\/span>\r\n<\/code><\/pre>\n<p>\u5728\u5934\u90e8\u90e8\u5206\uff0c\u60a8\u5f15\u7528\u4e86main.css\u6837\u5f0f\u8868\uff0c\u5176\u4e2d\u5305\u542b\u4e86\u5e94\u7528\u7a0b\u5e8f\u7684\u6837\u5f0f\u3002\u5728body\u6807\u7b7e\u4e2d\uff0c\u60a8\u521b\u5efa\u4e86\u4e00\u4e2aclass\u4e3atotal-count\u7684div\u5143\u7d20\uff0c\u5b83\u5c06\u5305\u542b\u4e00\u4e2a\u5728\u70b9\u51fb\u6309\u94ae\u65f6\u9012\u589e\u7684\u503c\u3002\u63a5\u4e0b\u6765\uff0c\u60a8\u521b\u5efa\u4e86\u53e6\u4e00\u4e2adiv\u5143\u7d20\uff0c\u5b83\u6709\u4e09\u4e2a\u6309\u94ae\u5143\u7d20\u4f5c\u4e3a\u5b50\u5143\u7d20\u3002\u7b2c\u4e00\u4e2a\u6309\u94ae\u5c06\u542f\u52a8\u4e00\u4e2a\u5360\u7528CPU\u8d44\u6e90\u7684\u4efb\u52a1\uff0c\u8be5\u4efb\u52a1\u662f\u963b\u585e\u7684\u3002\u7b2c\u4e8c\u4e2a\u6309\u94ae\u5c06\u9012\u589eclass\u4e3atotal-count\u7684div\u5143\u7d20\u4e2d\u7684\u503c\uff0c\u7b2c\u4e09\u4e2a\u6309\u94ae\u5c06\u89e6\u53d1JavaScript\u4ee3\u7801\u6765\u6539\u53d8\u80cc\u666f\u989c\u8272\u3002\u8fd9\u4e24\u4e2a\u4efb\u52a1\u662f\u975e\u963b\u585e\u7684\u3002<\/p>\n<p>\u4e0b\u4e00\u4e2adiv\u5143\u7d20\u5c06\u5305\u542b\u6765\u81eaCPU\u5bc6\u96c6\u578b\u4efb\u52a1\u7684\u8f93\u51fa\uff0c\u5e76\u4e14\u6700\u540e\u5728body\u6807\u7b7e\u7ed3\u675f\u4e4b\u524d\uff0c\u60a8\u4f1a\u5f15\u7528main.js\u6587\u4ef6\uff0c\u5176\u4e2d\u5c06\u5305\u542b\u6240\u6709\u7684JavaScript\u4ee3\u7801\u3002<\/p>\n<p>\u60a8\u53ef\u80fd\u6ce8\u610f\u5230\u8fd9\u4e9b\u5143\u7d20\u90fd\u6709ID\u548c\u7c7b\u3002\u5728\u540e\u9762\u7684\u6b65\u9aa4\u4e2d\uff0c\u60a8\u5c06\u4f7f\u7528\u5b83\u4eec\u6765\u5728JavaScript\u4e2d\u5f15\u7528\u8fd9\u4e9b\u5143\u7d20\u3002<\/p>\n<p>\u73b0\u5728\u4fdd\u5b58\u5e76\u9000\u51fa\u6587\u4ef6\u3002<\/p>\n<p>\u521b\u5efa\u5e76\u6253\u5f00 main.css \u6587\u4ef6\u3002<\/p>\n<pre class=\"post-pre\"><code><\/code><\/pre>\n<ol>\n<li data-prefix=\"$\"><span class=\"token function\">nano<\/span> main.css<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code><\/code><\/pre>\n<p>&nbsp;<\/p>\n<pre class=\"post-pre\"><code><\/code><\/pre>\n<p>\u5728\u60a8\u7684main.css\u6587\u4ef6\u4e2d\uff0c\u6dfb\u52a0\u4ee5\u4e0b\u5185\u5bb9\u6765\u6837\u5f0f\u5316\u5143\u7d20\uff1a<\/p>\n<div>Web Workers\u6f14\u793a\/main.css<\/p>\n<p>\u8fd9\u662f\u6587\u7ae0\u300a\u5982\u4f55\u4f7f\u7528Web Workers\u5904\u7406CPU\u5bc6\u96c6\u578b\u4efb\u52a1\u300b\u7684\u7b2c3\u90e8\u5206\uff08\u517115\u90e8\u5206\uff09\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"token selector\">body<\/span> <span class=\"token punctuation\">{<\/span>\r\n  <span class=\"token property\">background<\/span><span class=\"token punctuation\">:<\/span> #fff<span class=\"token punctuation\">;<\/span>\r\n  <span class=\"token property\">font-size<\/span><span class=\"token punctuation\">:<\/span> 16px<span class=\"token punctuation\">;<\/span>\r\n<span class=\"token punctuation\">}<\/span>\r\n\r\n<span class=\"token selector\">.wrapper<\/span> <span class=\"token punctuation\">{<\/span>\r\n  <span class=\"token property\">max-width<\/span><span class=\"token punctuation\">:<\/span> 600px<span class=\"token punctuation\">;<\/span>\r\n  <span class=\"token property\">margin<\/span><span class=\"token punctuation\">:<\/span> 0 auto<span class=\"token punctuation\">;<\/span>\r\n<span class=\"token punctuation\">}<\/span>\r\n<span class=\"token selector\">.total-count<\/span> <span class=\"token punctuation\">{<\/span>\r\n  <span class=\"token property\">margin-bottom<\/span><span class=\"token punctuation\">:<\/span> 34px<span class=\"token punctuation\">;<\/span>\r\n  <span class=\"token property\">font-size<\/span><span class=\"token punctuation\">:<\/span> 32px<span class=\"token punctuation\">;<\/span>\r\n  <span class=\"token property\">text-align<\/span><span class=\"token punctuation\">:<\/span> center<span class=\"token punctuation\">;<\/span>\r\n<span class=\"token punctuation\">}<\/span>\r\n\r\n<span class=\"token selector\">.buttons<\/span> <span class=\"token punctuation\">{<\/span>\r\n  <span class=\"token property\">border<\/span><span class=\"token punctuation\">:<\/span> 1px solid green<span class=\"token punctuation\">;<\/span>\r\n  <span class=\"token property\">padding<\/span><span class=\"token punctuation\">:<\/span> 1rem<span class=\"token punctuation\">;<\/span>\r\n  <span class=\"token property\">margin-bottom<\/span><span class=\"token punctuation\">:<\/span> 16px<span class=\"token punctuation\">;<\/span>\r\n<span class=\"token punctuation\">}<\/span>\r\n\r\n<span class=\"token selector\">.btn<\/span> <span class=\"token punctuation\">{<\/span>\r\n  <span class=\"token property\">border<\/span><span class=\"token punctuation\">:<\/span> 0<span class=\"token punctuation\">;<\/span>\r\n  <span class=\"token property\">padding<\/span><span class=\"token punctuation\">:<\/span> 1rem<span class=\"token punctuation\">;<\/span>\r\n<span class=\"token punctuation\">}<\/span>\r\n\r\n<span class=\"token selector\">.btn-blocking<\/span> <span class=\"token punctuation\">{<\/span>\r\n  <span class=\"token property\">background-color<\/span><span class=\"token punctuation\">:<\/span> #f44336<span class=\"token punctuation\">;<\/span>\r\n  <span class=\"token property\">color<\/span><span class=\"token punctuation\">:<\/span> #fff<span class=\"token punctuation\">;<\/span>\r\n<span class=\"token punctuation\">}<\/span>\r\n\r\n<span class=\"token selector\">#changebtn<\/span> <span class=\"token punctuation\">{<\/span>\r\n  <span class=\"token property\">background-color<\/span><span class=\"token punctuation\">:<\/span> #4caf50<span class=\"token punctuation\">;<\/span>\r\n  <span class=\"token property\">color<\/span><span class=\"token punctuation\">:<\/span> #fff<span class=\"token punctuation\">;<\/span>\r\n<span class=\"token punctuation\">}<\/span>\r\n<\/code><\/pre>\n<p>.buttons\u5b9a\u4e49\u4e86\u5b9e\u5fc3\u7eff\u8fb9\u6846\u548c\u8f7b\u5fae\u7684\u5185\u8fb9\u8ddd\uff0c\u800c\u963b\u6b62\u4efb\u52a1\u8fdb\u7a0b\u53c8\u8fdb\u4e00\u6b65\u901a\u8fc7.btn-blocking\u6837\u5f0f\u5b9a\u4e49\u4e86\u4e0d\u540c\u7684\u80cc\u666f\u989c\u8272\u3002<\/p>\n<p>\u4fdd\u5b58\u5e76\u5173\u95ed\u6587\u4ef6\u3002<\/p>\n<p>\u65e2\u7136\u4f60\u5df2\u7ecf\u5b9a\u4e49\u4e86CSS\u6837\u5f0f\uff0c\u73b0\u5728\u4f60\u9700\u8981\u7f16\u5199JavaScript\u4ee3\u7801\u6765\u4f7fHTML\u5143\u7d20\u4ea4\u4e92\u3002\u4fdd\u5b58\u5e76\u9000\u51fa\u4f60\u7684\u6587\u4ef6\u3002<\/p>\n<p>\u5728\u4f60\u7684\u7f16\u8f91\u5668\u4e2d\u521b\u5efa\u5e76\u6253\u5f00main.js\u6587\u4ef6\u3002<\/p>\n<pre class=\"post-pre\"><code><\/code><\/pre>\n<ol>\n<li data-prefix=\"$\"><span class=\"token function\">nano<\/span> main.js<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code><\/code><\/pre>\n<p>&nbsp;<\/p>\n<pre class=\"post-pre\"><code><\/code><\/pre>\n<p>\u5728\u4f60\u7684main.js\u6587\u4ef6\u4e2d\uff0c\u6dfb\u52a0\u4ee5\u4e0b\u4ee3\u7801\u4ee5\u5f15\u7528DOM\u5143\u7d20\uff1a<\/p>\n<div>Web Workers\u6f14\u793a\/main.js<\/div>\n<p>\u8fd9\u662f\u6587\u7ae0\u300a\u5982\u4f55\u4f7f\u7528Web Workers\u5904\u7406CPU\u5bc6\u96c6\u578b\u4efb\u52a1\u300b\u7684\u7b2c4\u90e8\u5206\uff08\u517115\u90e8\u5206\uff09\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"token keyword\">const<\/span> blockingBtn <span class=\"token operator\">=<\/span> document<span class=\"token punctuation\">.<\/span><span class=\"token function\">getElementById<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">\"blockbtn\"<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n<span class=\"token keyword\">const<\/span> incrementBtn <span class=\"token operator\">=<\/span> document<span class=\"token punctuation\">.<\/span><span class=\"token function\">getElementById<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">\"incrementbtn\"<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n<span class=\"token keyword\">const<\/span> changeColorBtn <span class=\"token operator\">=<\/span> document<span class=\"token punctuation\">.<\/span><span class=\"token function\">getElementById<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">\"changebtn\"<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n<span class=\"token keyword\">const<\/span> output <span class=\"token operator\">=<\/span> document<span class=\"token punctuation\">.<\/span><span class=\"token function\">querySelector<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">\".output\"<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n<span class=\"token keyword\">const<\/span> totalCountEl <span class=\"token operator\">=<\/span> document<span class=\"token punctuation\">.<\/span><span class=\"token function\">querySelector<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">\".total-count\"<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n<\/code><\/pre>\n<p>\u5728\u524d\u4e09\u884c\u4ee3\u7801\u4e2d\uff0c\u6211\u4eec\u4f7f\u7528document\u5bf9\u8c61\u7684getElementById()\u65b9\u6cd5\u901a\u8fc7ID\u5f15\u7528\u4e86\u6309\u94ae\u5143\u7d20\u3002\u5728\u6700\u540e\u4e24\u884c\u4e2d\uff0c\u6211\u4eec\u4f7f\u7528document\u5bf9\u8c61\u7684querySelector()\u65b9\u6cd5\u901a\u8fc7\u7c7b\u540d\u5f15\u7528\u4e86div\u5143\u7d20\u3002<\/p>\n<p>\u63a5\u4e0b\u6765\uff0c\u6211\u4eec\u5c06\u5b9a\u4e49\u4e00\u4e2a\u4e8b\u4ef6\u76d1\u542c\u5668\uff0c\u5f53\u70b9\u51fbincrementBtn\u6309\u94ae\u65f6\uff0c\u5b83\u4f1a\u589e\u52a0\u4e00\u4e2adiv\u5143\u7d20\u7684\u503c\u3002<\/p>\n<div>Worker\u793a\u4f8b\/main.js<\/p>\n<pre class=\"post-pre\"><code><span class=\"token operator\">...<\/span>\r\ntotalCountEl<span class=\"token punctuation\">.<\/span>textContent <span class=\"token operator\">=<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span>\r\n\r\nincrementBtn<span class=\"token punctuation\">.<\/span><span class=\"token function\">addEventListener<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">\"click\"<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">function<\/span> <span class=\"token function\">incrementValue<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n  <span class=\"token keyword\">let<\/span> counter <span class=\"token operator\">=<\/span> totalCountEl<span class=\"token punctuation\">.<\/span>textContent<span class=\"token punctuation\">;<\/span>\r\n  counter<span class=\"token operator\">++<\/span><span class=\"token punctuation\">;<\/span>\r\n  totalCountEl<span class=\"token punctuation\">.<\/span>textContent <span class=\"token operator\">=<\/span> counter<span class=\"token punctuation\">;<\/span>\r\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n<\/code><\/pre>\n<\/div>\n<p>\u9996\u5148\uff0c\u6211\u4eec\u5c06totalCountEl\u5143\u7d20\u7684\u6587\u672c\u5185\u5bb9\u8bbe\u7f6e\u4e3a0\u3002\u7136\u540e\uff0c\u6211\u4eec\u4f7f\u7528DOM\u7684addEventListener()\u65b9\u6cd5\u5c06\u4e00\u4e2a\u4e8b\u4ef6\u76d1\u542c\u5668\u9644\u52a0\u5230incrementBtn\u6309\u94ae\u4e0a\u3002\u8be5\u65b9\u6cd5\u63a5\u53d7\u4e24\u4e2a\u53c2\u6570\uff1a\u8981\u76d1\u542c\u7684\u4e8b\u4ef6\u548c\u4e00\u4e2a\u56de\u8c03\u51fd\u6570\u3002\u5728\u8fd9\u91cc\uff0c\u4e8b\u4ef6\u76d1\u542c\u5668\u76d1\u542c\u70b9\u51fb\u4e8b\u4ef6\uff0c\u5e76\u5728\u70b9\u51fb\u4e8b\u4ef6\u89e6\u53d1\u65f6\u8c03\u7528incrementValue()\u56de\u8c03\u51fd\u6570\u3002<\/p>\n<p>\u5728incrementValue\u56de\u8c03\u51fd\u6570\u4e2d\uff0c\u6211\u4eec\u4eceDOM\u4e2d\u83b7\u53d6totalCountEl\u5143\u7d20\u7684\u6587\u672c\u5185\u5bb9\u503c\uff0c\u5e76\u5c06\u5176\u8d4b\u503c\u7ed9\u8ba1\u6570\u5668\u53d8\u91cf\u3002\u7136\u540e\uff0c\u6211\u4eec\u5c06\u8be5\u503c\u589e\u52a01\uff0c\u5e76\u5c06\u589e\u52a0\u540e\u7684\u503c\u8bbe\u7f6e\u4e3atotalCountEl\u5143\u7d20\u7684\u6587\u672c\u5185\u5bb9\u3002<\/p>\n<p>\u63a5\u4e0b\u6765\uff0c\u6211\u4eec\u5c06\u4ee5\u4e0b\u4ee3\u7801\u6dfb\u52a0\u5230changeColorBtn\u6309\u94ae\u4e0a\uff0c\u4ee5\u4fbf\u5728\u70b9\u51fb\u6309\u94ae\u65f6\u968f\u673a\u66f4\u6539\u80cc\u666f\u989c\u8272\u3002<\/p>\n<div>Worker\u793a\u4f8b\/main.js<\/div>\n<p>\u8fd9\u662f\u6587\u7ae0\u300a\u5982\u4f55\u4f7f\u7528Web Workers\u5904\u7406CPU\u5bc6\u96c6\u578b\u4efb\u52a1\u300b\u7684\u7b2c5\u90e8\u5206\uff08\u517115\u90e8\u5206\uff09\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"token operator\">...<\/span>\r\nchangeColorBtn<span class=\"token punctuation\">.<\/span><span class=\"token function\">addEventListener<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">\"click\"<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">function<\/span> <span class=\"token function\">changeBackgroundColor<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n  colors <span class=\"token operator\">=<\/span> <span class=\"token punctuation\">[<\/span><span class=\"token string\">\"#009688\"<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">\"#ffc107\"<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">\"#dadada\"<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span>\r\n  <span class=\"token keyword\">const<\/span> randomIndex <span class=\"token operator\">=<\/span> Math<span class=\"token punctuation\">.<\/span><span class=\"token function\">floor<\/span><span class=\"token punctuation\">(<\/span>Math<span class=\"token punctuation\">.<\/span><span class=\"token function\">random<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">*<\/span> colors<span class=\"token punctuation\">.<\/span>length<span class=\"token punctuation\">)<\/span>\r\n  <span class=\"token keyword\">const<\/span> randomColor <span class=\"token operator\">=<\/span> colors<span class=\"token punctuation\">[<\/span>randomIndex<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span>\r\n  document<span class=\"token punctuation\">.<\/span>body<span class=\"token punctuation\">.<\/span>style<span class=\"token punctuation\">.<\/span>background <span class=\"token operator\">=<\/span> randomColor<span class=\"token punctuation\">;<\/span>\r\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n<\/code><\/pre>\n<p>\u5728\u5148\u524d\u7684\u4ee3\u7801\u4e2d\uff0c\u60a8\u6dfb\u52a0\u4e86\u4e00\u4e2a\u70b9\u51fb\u4e8b\u4ef6\u76d1\u542c\u5668\uff0c\u5f53\u7528\u6237\u70b9\u51fbchangeColorBtn\u6309\u94ae\u65f6\u4f1a\u8fd0\u884cchangeBackgroundColor\u56de\u8c03\u51fd\u6570\u3002\u5728\u56de\u8c03\u51fd\u6570\u4e2d\uff0c\u60a8\u5c06colors\u53d8\u91cf\u8bbe\u7f6e\u4e3a\u4e00\u4e2a\u5305\u542b\u4e09\u4e2a\u5341\u516d\u8fdb\u5236\u989c\u8272\u503c\u7684\u6570\u7ec4\u3002\u7136\u540e\u60a8\u8c03\u7528\u4e86Math.random()\u65b9\u6cd5\uff0c\u5e76\u5c06\u5176\u7ed3\u679c\u4e0e\u6570\u7ec4\u957f\u5ea6\u503c\u76f8\u4e58\uff0c\u4ee5\u751f\u6210\u4e00\u4e2a0\u5230\u6570\u7ec4\u957f\u5ea63\u4e4b\u95f4\u7684\u968f\u673a\u6570\u3002\u968f\u673a\u503c\u7136\u540e\u4f7f\u7528Math.floor()\u65b9\u6cd5\u5411\u4e0b\u53d6\u6574\uff0c\u5e76\u5b58\u50a8\u5728randomIndex\u53d8\u91cf\u4e2d\u3002<\/p>\n<p>\u7136\u540e\uff0c\u60a8\u4f7f\u7528\u968f\u673a\u7d22\u5f15\u4ece\u6570\u7ec4\u4e2d\u9009\u62e9\u4e00\u4e2a\u503c\uff0c\u7136\u540e\u5c06\u6587\u6863\u5bf9\u8c61\u7684body.style.background\u5c5e\u6027\u8bbe\u7f6e\u4e3a\u8be5\u989c\u8272\u3002<\/p>\n<p>\u73b0\u5728\u60a8\u5df2\u7ecf\u5b9e\u73b0\u4e86\u4e24\u4e2a\u89e6\u53d1\u975e\u963b\u585e\u4efb\u52a1\u6267\u884c\u7684\u6309\u94ae\uff0c\u60a8\u5c06\u4e3a\u5269\u4e0b\u7684\u6309\u94ae\u6dfb\u52a0\u4e00\u4e2a\u4e8b\u4ef6\u76d1\u542c\u5668\uff0c\u4ee5\u542f\u52a8\u4e00\u4e2a\u5360\u7528CPU\u8d44\u6e90\u8f83\u591a\u7684\u4efb\u52a1\u3002\u5faa\u73af\u5c06\u91cd\u590d\u4e94\u5341\u4ebf\u6b21\uff0c\u5e76\u5c06\u7ed3\u679c\u4fdd\u5b58\u5728DOM\u4e2d\u3002<\/p>\n<p>\u4ecd\u7136\u5728\u60a8\u7684main.js\u6587\u4ef6\u4e2d\uff0c\u6dfb\u52a0\u4ee5\u4e0b\u4ee3\u7801\u6765\u4e3a\u4e00\u4e2a\u6309\u94ae\u6dfb\u52a0\u70b9\u51fb\u4e8b\u4ef6\u76d1\u542c\u5668\uff0c\u8be5\u6309\u94ae\u5c06\u542f\u52a8\u4e00\u4e2a\u963b\u585e\u4efb\u52a1\u3002<\/p>\n<div>\u5de5\u4eba\u793a\u4f8b\/\u4e3b.js<\/p>\n<pre class=\"post-pre\"><code><span class=\"token operator\">...<\/span>\r\nblockingBtn<span class=\"token punctuation\">.<\/span><span class=\"token function\">addEventListener<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">\"click\"<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">function<\/span> <span class=\"token function\">blockMainThread<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n  <span class=\"token keyword\">let<\/span> counter <span class=\"token operator\">=<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span>\r\n  <span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">let<\/span> i <span class=\"token operator\">=<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span> i <span class=\"token operator\">&lt;<\/span> <span class=\"token number\">5_000_000_000<\/span><span class=\"token punctuation\">;<\/span> i<span class=\"token operator\">++<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n    counter<span class=\"token operator\">++<\/span><span class=\"token punctuation\">;<\/span>\r\n  <span class=\"token punctuation\">}<\/span>\r\n  output<span class=\"token punctuation\">.<\/span>textContent <span class=\"token operator\">=<\/span> <span class=\"token template-string\"><span class=\"token template-punctuation string\">`<\/span><span class=\"token string\">\u8ba1\u7b97\u7ed3\u679c: <\/span><span class=\"token interpolation\"><span class=\"token interpolation-punctuation punctuation\">${<\/span>counter<span class=\"token interpolation-punctuation punctuation\">}<\/span><\/span><span class=\"token template-punctuation string\">`<\/span><\/span><span class=\"token punctuation\">;<\/span>\r\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n<\/code><\/pre>\n<\/div>\n<p>\u5728\u524d\u9762\u7684\u4ee3\u7801\u4e2d\uff0c\u60a8\u6dfb\u52a0\u4e86\u4e00\u4e2a\u70b9\u51fb\u4e8b\u4ef6\u76d1\u542c\u5668\uff0c\u5b83\u8fd0\u884cblockMainThread()\u56de\u8c03\u51fd\u6570\u3002\u5728\u51fd\u6570\u5185\u90e8\uff0c\u60a8\u5c06\u8ba1\u6570\u5668\u8bbe\u7f6e\u4e3a0\uff0c\u7136\u540e\u521b\u5efa\u4e86\u4e00\u4e2a\u5faa\u73af\uff0c\u5faa\u73af\u8fed\u4ee3\u4e94\u5341\u4ebf\u6b21\u3002\u5728\u6bcf\u6b21\u8fed\u4ee3\u671f\u95f4\uff0c\u8ba1\u6570\u5668\u7684\u503c\u589e\u52a01\u3002\u5faa\u73af\u7ed3\u675f\u540e\uff0c\u8ba1\u7b97\u7684\u7ed3\u679c\u88ab\u8bbe\u7f6e\u4e3a\u8f93\u51fa\u5143\u7d20\u7684\u503c\u3002<\/p>\n<p>\u73b0\u5728\u5b8c\u6574\u7684\u6587\u4ef6\u5c06\u4e0e\u4ee5\u4e0b\u5185\u5bb9\u76f8\u5339\u914d\u3002<\/p>\n<div>\u5de5\u4eba_demo\/main.js<\/div>\n<p>\u8fd9\u662f\u6587\u7ae0\u300a\u5982\u4f55\u4f7f\u7528Web Workers\u5904\u7406CPU\u5bc6\u96c6\u578b\u4efb\u52a1\u300b\u7684\u7b2c6\u90e8\u5206\uff08\u517115\u90e8\u5206\uff09\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"token keyword\">const<\/span> blockingBtn <span class=\"token operator\">=<\/span> document<span class=\"token punctuation\">.<\/span><span class=\"token function\">getElementById<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">\"blockbtn\"<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n<span class=\"token keyword\">const<\/span> incrementBtn <span class=\"token operator\">=<\/span> document<span class=\"token punctuation\">.<\/span><span class=\"token function\">getElementById<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">\"incrementbtn\"<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n<span class=\"token keyword\">const<\/span> changeColorBtn <span class=\"token operator\">=<\/span> document<span class=\"token punctuation\">.<\/span><span class=\"token function\">getElementById<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">\"changebtn\"<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n<span class=\"token keyword\">const<\/span> output <span class=\"token operator\">=<\/span> document<span class=\"token punctuation\">.<\/span><span class=\"token function\">querySelector<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">\".output\"<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n<span class=\"token keyword\">const<\/span> totalCountEl <span class=\"token operator\">=<\/span> document<span class=\"token punctuation\">.<\/span><span class=\"token function\">querySelector<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">\".total-count\"<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\ntotalCountEl<span class=\"token punctuation\">.<\/span>textContent <span class=\"token operator\">=<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span>\r\n\r\nincrementBtn<span class=\"token punctuation\">.<\/span><span class=\"token function\">addEventListener<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">\"click\"<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">function<\/span> <span class=\"token function\">incrementValue<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n  <span class=\"token keyword\">let<\/span> counter <span class=\"token operator\">=<\/span> totalCountEl<span class=\"token punctuation\">.<\/span>textContent<span class=\"token punctuation\">;<\/span>\r\n  counter<span class=\"token operator\">++<\/span><span class=\"token punctuation\">;<\/span>\r\n  totalCountEl<span class=\"token punctuation\">.<\/span>textContent <span class=\"token operator\">=<\/span> counter<span class=\"token punctuation\">;<\/span>\r\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n\r\nchangeColorBtn<span class=\"token punctuation\">.<\/span><span class=\"token function\">addEventListener<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">\"click\"<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">function<\/span> <span class=\"token function\">changeBackgroundColor<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n  colors <span class=\"token operator\">=<\/span> <span class=\"token punctuation\">[<\/span><span class=\"token string\">\"#009688\"<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">\"#ffc107\"<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">\"#dadada\"<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span>\r\n  <span class=\"token keyword\">const<\/span> randomIndex <span class=\"token operator\">=<\/span> Math<span class=\"token punctuation\">.<\/span><span class=\"token function\">floor<\/span><span class=\"token punctuation\">(<\/span>Math<span class=\"token punctuation\">.<\/span><span class=\"token function\">random<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">*<\/span> colors<span class=\"token punctuation\">.<\/span>length<span class=\"token punctuation\">)<\/span>\r\n  <span class=\"token keyword\">const<\/span> randomColor <span class=\"token operator\">=<\/span> colors<span class=\"token punctuation\">[<\/span>randomIndex<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span>\r\n  document<span class=\"token punctuation\">.<\/span>body<span class=\"token punctuation\">.<\/span>style<span class=\"token punctuation\">.<\/span>background <span class=\"token operator\">=<\/span> randomColor<span class=\"token punctuation\">;<\/span>\r\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n\r\nblockingBtn<span class=\"token punctuation\">.<\/span><span class=\"token function\">addEventListener<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">\"click\"<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">function<\/span> <span class=\"token function\">blockMainThread<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n  <span class=\"token keyword\">let<\/span> counter <span class=\"token operator\">=<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span>\r\n  <span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">let<\/span> i <span class=\"token operator\">=<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span> i <span class=\"token operator\"><<\/span> <span class=\"token number\">5_000_000_000<\/span><span class=\"token punctuation\">;<\/span> i<span class=\"token operator\">++<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n    counter<span class=\"token operator\">++<\/span><span class=\"token punctuation\">;<\/span>\r\n  <span class=\"token punctuation\">}<\/span>\r\n  output<span class=\"token punctuation\">.<\/span>textContent <span class=\"token operator\">=<\/span> <span class=\"token template-string\"><span class=\"token template-punctuation string\">`<\/span><span class=\"token string\">Result: <\/span><span class=\"token interpolation\"><span class=\"token interpolation-punctuation punctuation\">${<\/span>counter<span class=\"token interpolation-punctuation punctuation\">}<\/span><\/span><span class=\"token template-punctuation string\">`<\/span><\/span><span class=\"token punctuation\">;<\/span>\r\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n<\/code><\/pre>\n<p>\u4e00\u65e6\u60a8\u8f93\u5165\u4ee3\u7801\u5b8c\u6210\uff0c\u4fdd\u5b58\u5e76\u9000\u51fa\u6587\u4ef6\u3002<\/p>\n<p>\u4e3a\u4e86\u907f\u514d\u5728\u7b2c\u4e09\u6b65\u5f00\u59cb\u4f7f\u7528Web Workers\u65f6\u51fa\u73b0\u8de8\u57df\u8d44\u6e90\u5171\u4eab\uff08CORS\uff09\u9519\u8bef\uff0c\u60a8\u9700\u8981\u4e3a\u5e94\u7528\u7a0b\u5e8f\u521b\u5efa\u4e00\u4e2aWeb\u670d\u52a1\u5668\u3002\u8fd0\u884c\u4ee5\u4e0b\u547d\u4ee4\u521b\u5efa\u670d\u52a1\u5668\uff1a<\/p>\n<pre class=\"post-pre\"><code><\/code><\/pre>\n<ol>\n<li data-prefix=\"$\">npx serve <span class=\"token builtin class-name\">.<\/span><\/li>\n<\/ol>\n<pre class=\"post-pre\"><code><\/code><\/pre>\n<p>\u8f93\u5165y\u4ee5\u786e\u8ba4\uff0c\u63a7\u5236\u53f0\u5c06\u8f93\u51fa&#8221;\u6b63\u5728\u63d0\u4f9b\u670d\u52a1\uff01&#8221;\u7684\u6d88\u606f\u6765\u786e\u8ba4\u670d\u52a1\u5668\u6b63\u5728\u8fd0\u884c\u3002<\/p>\n<pre class=\"post-pre\"><code><\/code><\/pre>\n<div class=\"secondary-code-label\" title=\"Output\">\u8f93\u51fa<\/div>\n<pre class=\"post-pre\"><code>\u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510\r\n\u2502                                                     \u2502\r\n\u2502                     \u670d\u52a1\u5df2\u542f\u52a8\uff01                     \u2502\r\n\u2502                                                     \u2502\r\n\u2502 - \u672c\u5730\uff1a    http:\/\/localhost:3000                   \u2502\r\n\u2502 - \u5728\u60a8\u7684\u7f51\u7edc\u4e2d\uff1a http:\/\/your_ip_address:3000        \u2502\r\n\u2502                                                     \u2502\r\n\u2502          \u5df2\u5c06\u672c\u5730\u5730\u5740\u590d\u5236\u5230\u526a\u8d34\u677f\uff01                 \u2502\r\n\u2502                                                     \u2502\r\n\u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518<\/code><\/pre>\n<p>\u6253\u5f00\u60a8\u504f\u7231\u7684\u7f51\u7edc\u6d4f\u89c8\u5668\uff0c\u8bbf\u95ee <a href=\"http:\/\/localhost:3000\/index.html\">http:\/\/localhost:3000\/index.html<\/a>\u3002<\/p>\n<div class=\"post-conf-note\">\n<p class=\"post-conf-desc\">\u6ce8\u610f\uff1a\u5982\u679c\u60a8\u6b63\u5728\u8fdc\u7a0b\u670d\u52a1\u5668\u4e0a\u8fdb\u884c\u6559\u7a0b\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528\u7aef\u53e3\u8f6c\u53d1\u5728\u6d4f\u89c8\u5668\u4e2d\u67e5\u770bindex.html\u6587\u4ef6\u3002<\/p>\n<p>\u5728\u5f53\u524d\u7ec8\u7aef\u4e2d\uff0c\u8f93\u5165\u4ee5\u4e0b\u547d\u4ee4\u542f\u52a8\u4e00\u4e2aweb\u670d\u52a1\u5668\uff1a<\/p>\n<pre class=\"post-pre\"><code>npx serve<\/code><\/pre>\n<p>\u5728\u63d0\u793a\u65f6\uff0c\u8f93\u5165y\u4ee5\u7ee7\u7eed\u3002<\/p>\n<p>\u60a8\u7684\u63a7\u5236\u53f0\u53ef\u80fd\u4f1a\u52a0\u8f7d\u4ee5\u4e0b\u9519\u8bef\uff0c\u4f46\u8fd9\u4e0d\u4f1a\u5f71\u54cd\u60a8\u8bbf\u95eeweb\u670d\u52a1\u5668\u7684\u80fd\u529b\uff1a<\/p>\n<pre class=\"post-pre\"><code>ERROR\uff1a\u65e0\u6cd5\u5c06\u670d\u52a1\u5668\u5730\u5740\u590d\u5236\u5230\u526a\u8d34\u677f\uff1a\u627e\u4e0d\u5230\"xsel\"\u4e8c\u8fdb\u5236\u6587\u4ef6\uff0c\u4e14\u56de\u9000\u64cd\u4f5c\u65e0\u6548\u3002\u5728Debian\/Ubuntu\u4e0a\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\u5b89\u88c5xsel\uff1asudo apt install xsel\u3002<\/code><\/pre>\n<\/div>\n<pre class=\"post-pre\"><code>\u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510\r\n\u2502                                                     \u2502\r\n\u2502                     \u670d\u52a1\u5df2\u542f\u52a8\uff01                     \u2502\r\n\u2502                                                     \u2502\r\n\u2502 - \u672c\u5730\uff1a    http:\/\/localhost:3000                   \u2502\r\n\u2502 - \u5728\u60a8\u7684\u7f51\u7edc\u4e2d\uff1a http:\/\/your_ip_address:3000        \u2502\r\n\u2502                                                     \u2502\r\n\u2502          \u5df2\u5c06\u672c\u5730\u5730\u5740\u590d\u5236\u5230\u526a\u8d34\u677f\uff01                 \u2502\r\n\u2502                                                     \u2502\r\n\u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518<\/code><\/pre>\n<p>\u5728\u672c\u5730\u673a\u5668\u4e0a\u6253\u5f00\u7b2c\u4e8c\u4e2a\u7ec8\u7aef\uff0c\u7136\u540e\u8f93\u5165\u4ee5\u4e0b\u547d\u4ee4\uff1a<\/p>\n<pre class=\"post-pre\"><code>ssh -L 3000:localhost:3000 your_non_root_user@your_server_ip<\/code><\/pre>\n<p>\u8fd4\u56de\u6d4f\u89c8\u5668\u5e76\u8bbf\u95ee<a href=\"http:\/\/localhost:3000\/index.html\">http:\/\/localhost:3000\/index.html<\/a>\u4ee5\u8bbf\u95ee\u60a8\u7684\u5e94\u7528\u7a0b\u5e8f\u4e3b\u9875\u3002\u5f53\u9875\u9762\u52a0\u8f7d\u65f6\uff0c\u5b83\u5c06\u663e\u793a\u4e00\u4e2a\u5e26\u6709&#8221;\u963b\u6b62\u4efb\u52a1&#8221;\u3001&#8221;\u9012\u589e&#8221;\u548c&#8221;\u6539\u53d8\u80cc\u666f&#8221;\u6309\u94ae\u7684\u4e3b\u9875\u3002\u9012\u589e\u8ba1\u6570\u5668\u5c06\u4ece0\u5f00\u59cb\uff0c\u56e0\u4e3a\u60a8\u8fd8\u6ca1\u6709\u6309\u4e0b\u9012\u589e\u8ba1\u6570\u7684\u6309\u94ae\u3002<\/p>\n<div class=\"post-image-container\">\n  <img decoding=\"async\" class=\"post-images\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/656460c7a4b2f92e6c7248b8\/65-0.png\" alt=\"\u5e94\u7528\u7a0b\u5e8f\u4e3b\u9875\u622a\u56fe\" \/>\n<\/div>\n<p>\u9996\u5148\uff0c\u591a\u6b21\u70b9\u51fb\u589e\u52a0\u6309\u94ae\uff0c\u4ee5\u4fbf\u5728\u6bcf\u6b21\u70b9\u51fb\u65f6\u66f4\u65b0\u9875\u9762\u4e0a\u7684\u6570\u5b57\u3002<\/p>\n<div class=\"post-image-container\">\n  <img decoding=\"async\" class=\"post-images\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/656460c7a4b2f92e6c7248b8\/67-0.png\" alt=\"\u70b9\u51fb\u589e\u52a0\u6309\u94ae\u540e\u6570\u5b57\u9012\u589e\u5230\u4e03\u7684\u4e3b\u9875\u622a\u56fe\" \/>\n<\/div>\n<p>\u5176\u6b21\uff0c\u70b9\u51fb\u51e0\u6b21&#8221;\u66f4\u6539\u80cc\u666f&#8221;\u6309\u94ae\u6765\u6539\u53d8\u9875\u9762\u7684\u80cc\u666f\u989c\u8272\u3002<\/p>\n<div class=\"post-image-container\">\n  <img decoding=\"async\" class=\"post-images\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/656460c7a4b2f92e6c7248b8\/69-0.png\" alt=\"\u70b9\u51fb\u66f4\u6539\u80cc\u666f\u6309\u94ae\u540e\u80cc\u666f\u53d8\u4e3a\u7eff\u8272\u7684\u4e3b\u9875\u622a\u56fe\" \/>\n<\/div>\n<p>\u6700\u540e\uff0c\u70b9\u51fb\u963b\u585e\u4efb\u52a1\u6309\u94ae\uff0c\u7136\u540e\u968f\u673a\u70b9\u51fb\u589e\u52a0\u6309\u94ae\u548c\u66f4\u6539\u80cc\u666f\u6309\u94ae\u3002\u9875\u9762\u5c06\u53d8\u5f97\u65e0\u54cd\u5e94\uff0c\u6309\u94ae\u5c06\u65e0\u6548\u3002\u8fd9\u4e2a\u51bb\u7ed3\u662f\u56e0\u4e3a\u963b\u585e\u4efb\u52a1\u6309\u94ae\u5f00\u59cb\u4e86\u4e00\u4e2a\u6d88\u8017CPU\u7684\u4efb\u52a1\uff0c\u5bfc\u81f4\u4e3b\u7ebf\u7a0b\u88ab\u963b\u585e\uff0c\u5176\u4ed6\u4ee3\u7801\u76f4\u5230\u4e3b\u7ebf\u7a0b\u7a7a\u95f2\u624d\u4f1a\u6267\u884c\u3002\u8fc7\u4e00\u6bb5\u65f6\u95f4\u540e\uff0c\u5f53CPU\u5bc6\u96c6\u4efb\u52a1\u5b8c\u6210\u65f6\uff0c\u9875\u9762\u5c06\u663e\u793a\u7ed3\u679c\uff1a5000000000\u3002\u6b64\u65f6\uff0c\u5982\u679c\u70b9\u51fb\u5176\u4ed6\u6309\u94ae\uff0c\u5b83\u4eec\u5c06\u6062\u590d\u6b63\u5e38\u5de5\u4f5c\u3002<\/p>\n<p>\u6b63\u5982\u60a8\u6240\u7ecf\u5386\u7684\uff0c\u4e00\u4e2a\u963b\u585e\u4efb\u52a1\u5bf9\u7528\u6237\u6765\u8bf4\u662f\u7acb\u5373\u53ef\u89c1\u7684\uff0c\u5e76\u4e14\u4f1a\u635f\u5bb3\u60a8\u7684\u5e94\u7528\u7528\u6237\u4f53\u9a8c\u3002<\/p>\n<p>\u73b0\u5728\u60a8\u5df2\u7ecf\u521b\u5efa\u4e86\u4e00\u4e2a\u901a\u8fc7\u4e3b\u7ebf\u7a0b\u51bb\u7ed3\u5e94\u7528\u7a0b\u5e8f\u7684\u963b\u585e\u4efb\u52a1\u7684\u5e94\u7528\u7a0b\u5e8f\uff0c\u60a8\u5c06\u4f7f\u7528 Promise \u5c06 CPU \u5bc6\u96c6\u578b\u4efb\u52a1\u8f6c\u6362\u4e3a\u975e\u963b\u585e\u4efb\u52a1\u3002<\/p>\n<h2>\u7b2c\u4e8c\u6b65 &#8211; \u4f7f\u7528Promise\u6765\u5378\u8f7dCPU\u5bc6\u96c6\u578b\u4efb\u52a1<\/h2>\n<p>\u4f7f\u7528Fetch API\u6216\u5176\u4ed6\u57fa\u4e8ePromise\u7684\u65b9\u6cd5\u5904\u7406I\/O\u4efb\u52a1\u6709\u65f6\u4f1a\u7ed9\u4eba\u4e00\u79cd\u9519\u8bef\u7684\u5370\u8c61\uff0c\u5373\u5c06\u4e00\u4e2aCPU\u5bc6\u96c6\u578b\u4efb\u52a1\u5305\u88c5\u5728Promise\u4e2d\u53ef\u4ee5\u4f7f\u5176\u53d8\u4e3a\u975e\u963b\u585e\u3002\u5982\u4ecb\u7ecd\u6240\u8ff0\uff0cI\/O\u4efb\u52a1\u4e4b\u6240\u4ee5\u662f\u975e\u963b\u585e\u7684\uff0c\u662f\u56e0\u4e3a\u5b83\u4eec\u7531\u64cd\u4f5c\u7cfb\u7edf\u5904\u7406\uff0c\u64cd\u4f5c\u7cfb\u7edf\u5728\u5b8c\u6210\u4efb\u52a1\u65f6\u4f1a\u901a\u77e5JavaScript\u5f15\u64ce\u3002\u5f53\u64cd\u4f5c\u7cfb\u7edf\u6267\u884cI\/O\u4efb\u52a1\u65f6\uff0c\u4e0eI\/O\u4efb\u52a1\u76f8\u5173\u7684\u56de\u8c03\u4f1a\u5728\u4e00\u4e2a\u961f\u5217\u4e2d\u7b49\u5f85\u64cd\u4f5c\u7cfb\u7edf\u7684\u54cd\u5e94\u3002\u5728\u5b83\u4eec\u7b49\u5f85\u7684\u540c\u65f6\uff0c\u4e3b\u7ebf\u7a0b\u53ef\u4ee5\u5904\u7406\u6240\u6709\u540e\u7eed\u4efb\u52a1\u3002\u5f53\u64cd\u4f5c\u7cfb\u7edf\u53d1\u9001\u54cd\u5e94\u65f6\uff0c\u56de\u8c03\u5728\u4e3b\u7ebf\u7a0b\u4e2d\u6267\u884c\uff0c\u56de\u8c03\u4e4b\u95f4\u6ca1\u6709\u5e76\u884c\u6267\u884c\u3002<\/p>\n<p>\u4e3a\u4e86\u8bc1\u660ePromise\u4e0d\u80fd\u4f7fCPU\u7ed1\u5b9a\u4efb\u52a1\u53d8\u4e3a\u975e\u963b\u585e\u72b6\u6001\uff0c\u60a8\u5c06\u5728\u6b64\u6b65\u9aa4\u4e2d\u5c06CPU\u5bc6\u96c6\u578b\u4efb\u52a1\u5305\u88c5\u5728\u4e00\u4e2aPromise\u4e2d\u3002<\/p>\n<p>\u5728\u60a8\u7684\u6587\u672c\u7f16\u8f91\u5668\u4e2d\uff0c\u6253\u5f00main.js\u6587\u4ef6\uff1a<\/p>\n<pre class=\"post-pre\"><code>nano main.js<\/code><\/pre>\n<p>\u5728\u60a8\u7684main.js\u6587\u4ef6\u4e2d\uff0c\u6dfb\u52a0\u8fd9\u6bb5\u4ee3\u7801\u6765\u521b\u5efa\u4e00\u4e2acalculateCount()\u51fd\u6570\uff0c\u5b83\u5c06\u4e00\u4e2a\u8017\u8d39\u5927\u91cfCPU\u7684\u4efb\u52a1\u5c01\u88c5\u5728\u4e00\u4e2aPromise\u4e2d\u3002<\/p>\n<div class=\"post-code-note\">worker-demo\/main.js<\/div>\n<p>\u8fd9\u662f\u6587\u7ae0\u300a\u5982\u4f55\u4f7f\u7528Web Workers\u5904\u7406CPU\u5bc6\u96c6\u578b\u4efb\u52a1\u300b\u7684\u7b2c8\u90e8\u5206\uff08\u517115\u90e8\u5206\uff09\u3002<\/p>\n<div class=\"code-container\">\n<pre class=\"post-pre\"><code><span class=\"token operator\">...<\/span>\r\n<mark><span class=\"token keyword\">function<\/span> <span class=\"token function\">calculateCount<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><\/mark>\r\n  <mark><span class=\"token keyword\">return<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">Promise<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">(<\/span><span class=\"token parameter\">resolve<span class=\"token punctuation\">,<\/span> reject<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">=&gt;<\/span> <span class=\"token punctuation\">{<\/span><\/mark>\r\n    <mark><span class=\"token keyword\">let<\/span> counter <span class=\"token operator\">=<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><\/mark>\r\n    <mark><span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">let<\/span> i <span class=\"token operator\">=<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span> i <span class=\"token operator\">&lt;<\/span> <span class=\"token number\">5_000_000_000<\/span><span class=\"token punctuation\">;<\/span> i<span class=\"token operator\">++<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><\/mark>\r\n      <mark>counter<span class=\"token operator\">++<\/span><span class=\"token punctuation\">;<\/span><\/mark>\r\n    <mark><span class=\"token punctuation\">}<\/span><\/mark>\r\n    <mark><span class=\"token function\">resolve<\/span><span class=\"token punctuation\">(<\/span>counter<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/mark>\r\n  <mark><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/mark>\r\n<mark><span class=\"token punctuation\">}<\/span><\/mark>\r\n\r\nblockingBtn<span class=\"token punctuation\">.<\/span><span class=\"token function\">addEventListener<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">\"click\"<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">function<\/span> <span class=\"token function\">blockMainThread<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">{<\/span>\r\n  <span class=\"token operator\">...<\/span><span class=\"token punctuation\">.<\/span>\r\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span>\r\n<\/code><\/pre>\n<\/div>\n<p><code>calculateCount()<\/code>\u51fd\u6570\u8fd4\u56de\u4e00\u4e2aPromise\u3002\u5728\u8fd9\u4e2a\u51fd\u6570\u4e2d\uff0c\u4f7f\u7528<code>new Promise<\/code>\u8bed\u6cd5\u521d\u59cb\u5316\u4e86\u4e00\u4e2apromise\uff0c\u8be5promise\u63a5\u53d7\u4e00\u4e2a\u56de\u8c03\u51fd\u6570\u4f5c\u4e3a\u53c2\u6570\uff0c\u8be5\u56de\u8c03\u51fd\u6570\u5305\u542b<code>resolve<\/code>\u548c<code>reject<\/code>\u53c2\u6570\u3002\u8fd9\u4e9b\u53c2\u6570\u5904\u7406\u56de\u8c03\u4e2d\u64cd\u4f5c\u7684\u6210\u529f\u6216\u5931\u8d25\u3002\u56de\u8c03\u4e2d\u5305\u542b\u4e86\u4e00\u4e2a\u8017\u8d39CPU\u7684\u5faa\u73af\uff0c\u5faa\u73af\u8fed\u4ee3\u4e94\u5341\u4ebf\u6b21\u3002\u5faa\u73af\u7ed3\u675f\u540e\uff0c\u4f7f\u7528<code>resolve<\/code>\u65b9\u6cd5\u4f20\u9012\u7ed3\u679c\u3002<\/p>\n<p>\u73b0\u5728\u5728<code>calculateCount()<\/code>\u51fd\u6570\u4e2d\u6709\u4e00\u4e2a\u53d7CPU\u9650\u5236\u7684\u4efb\u52a1\uff0c\u9700\u8981\u5220\u9664\u9ad8\u4eae\u663e\u793a\u7684\u4ee3\u7801\u3002<\/p>\n<div class=\"code-container\">\n<div class=\"file-path\">\u5de5\u4eba\u6f14\u793a\/\u4e3b\u8981.js<\/div>\n<pre class=\"post-pre\"><code><span class=\"token operator\">...<\/span>\r\nblockingBtn<span class=\"token punctuation\">.<\/span><span class=\"token function\">addEventListener<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">\"click\"<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">function<\/span> <span class=\"token function\">blockMainThread<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n  <mark><span class=\"token keyword\">let<\/span> counter <span class=\"token operator\">=<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><\/mark>\r\n  <mark><span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">let<\/span> i <span class=\"token operator\">=<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span> i <span class=\"token operator\">&lt;<\/span> <span class=\"token number\">5_000_000_000<\/span><span class=\"token punctuation\">;<\/span> i<span class=\"token operator\">++<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><\/mark>\r\n    <mark>counter<span class=\"token operator\">++<\/span><span class=\"token punctuation\">;<\/span><\/mark>\r\n  <mark><span class=\"token punctuation\">}<\/span><\/mark>\r\n  output<span class=\"token punctuation\">.<\/span>textContent <span class=\"token operator\">=<\/span> <span class=\"token template-string\"><span class=\"token template-punctuation string\">`<\/span><span class=\"token string\">\u7ed3\u679c: <\/span><span class=\"token interpolation\"><span class=\"token interpolation-punctuation punctuation\">${<\/span>counter<span class=\"token interpolation-punctuation punctuation\">}<\/span><\/span><span class=\"token template-punctuation string\">`<\/span><\/span><span class=\"token punctuation\">;<\/span>\r\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n<\/code><\/pre>\n<\/div>\n<p>\u5728\u79fb\u9664\u4e86\u4ee3\u7801\u4e4b\u540e\uff0c\u5c06\u5728<code>blockMainThread()<\/code>\u51fd\u6570\u4e2d\u8c03\u7528<code>calculateCount()<\/code>\u51fd\u6570\u3002\u7531\u4e8e\u8be5\u51fd\u6570\u8fd4\u56de\u4e00\u4e2apromise\uff0c\u9700\u8981\u4f7f\u7528async\/await\u8bed\u6cd5\u6765\u6d88\u8017\u8fd9\u4e2apromise\u3002<\/p>\n<p>\u5c06\u4e0b\u9762\u7684\u9ad8\u4eae\u4ee3\u7801\u6dfb\u52a0\u5230<code>blockMainThread()<\/code>\u51fd\u6570\u4e2d\uff0c\u4f7f\u5176\u5f02\u6b65\u5e76\u8c03\u7528<code>calculateCount()<\/code>\u51fd\u6570\u3002<\/p>\n<div class=\"code-container\">\n<div class=\"file-path\">\u5de5\u4eba\u5c55\u793a\/\u4e3b\u8981.js<\/div>\n<\/div>\n<pre class=\"post-pre\"><code><span class=\"token operator\">...<\/span>\r\nblockingBtn<span class=\"token punctuation\">.<\/span><span class=\"token function\">addEventListener<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">\"click\"<\/span><span class=\"token punctuation\">,<\/span> <mark><span class=\"token keyword\">async<\/span><\/mark> <span class=\"token keyword\">function<\/span> <span class=\"token function\">blockMainThread<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n  <mark><span class=\"token keyword\">const<\/span> counter <span class=\"token operator\">=<\/span> <span class=\"token keyword\">await<\/span> <span class=\"token function\">calculateCount<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/mark>\r\n  output<span class=\"token punctuation\">.<\/span>textContent <span class=\"token operator\">=<\/span> <span class=\"token template-string\"><span class=\"token template-punctuation string\">`<\/span><span class=\"token string\">\u7ed3\u679c: <\/span><span class=\"token interpolation\"><span class=\"token interpolation-punctuation punctuation\">${<\/span>counter<span class=\"token interpolation-punctuation punctuation\">}<\/span><\/span><span class=\"token template-punctuation string\">`<\/span><\/span><span class=\"token punctuation\">;<\/span>\r\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n<\/code><\/pre>\n<p>\u5728\u4e0a\u8ff0JavaScript\u4ee3\u7801\u4e2d\uff0c\u6211\u4eec\u5728<code>blockMainThread()<\/code>\u51fd\u6570\u524d\u6dfb\u52a0\u4e86<code>async<\/code>\u5173\u952e\u5b57\uff0c\u4f7f\u5176\u6210\u4e3a\u4e00\u4e2a\u5f02\u6b65\u51fd\u6570\u3002\u8fd9\u79cd\u65b9\u6cd5\u662fJavaScript\u5f02\u6b65\u7f16\u7a0b\u7684\u91cd\u8981\u6280\u672f\uff0c\u53ef\u4ee5\u6709\u6548\u5904\u7406CPU\u5bc6\u96c6\u578b\u4efb\u52a1\u800c\u4e0d\u963b\u585e\u4e3b\u7ebf\u7a0b\u3002<\/p>\n<p>\u5728\u51fd\u6570\u5185\u90e8\uff0c\u6211\u4eec\u4f7f\u7528<code>await<\/code>\u5173\u952e\u5b57\u6765\u8c03\u7528<code>calculateCount()<\/code>\u51fd\u6570\u3002<code>await<\/code>\u64cd\u4f5c\u7b26\u4f1a\u6682\u505c\u51fd\u6570\u6267\u884c\uff0c\u76f4\u5230Promise\u5bf9\u8c61\u89e3\u6790\u5b8c\u6210\u3002\u8fd9\u79cd\u5f02\u6b65\u5904\u7406\u65b9\u5f0f\u662fWeb Workers\u6027\u80fd\u4f18\u5316\u7684\u5173\u952e\u7b56\u7565\u4e4b\u4e00\u3002<\/p>\n<p>\u4e00\u65e6Promise\u89e3\u6790\u5b8c\u6210\uff0c\u8ba1\u6570\u5668\u53d8\u91cf\u5c06\u88ab\u8bbe\u7f6e\u4e3a\u8fd4\u56de\u503c\uff0c\u8f93\u51fadiv\u5143\u7d20\u5c06\u663e\u793aCPU\u5bc6\u96c6\u578b\u4efb\u52a1\u7684\u8ba1\u7b97\u7ed3\u679c\u3002\u8fd9\u79cd\u5f02\u6b65\u7f16\u7a0b\u6a21\u5f0f\u53ef\u4ee5\u663e\u8457\u63d0\u5347Web\u5e94\u7528\u7684\u54cd\u5e94\u901f\u5ea6\u548c\u7528\u6237\u4f53\u9a8c\u3002<\/p>\n<p>\u73b0\u5728\uff0c\u60a8\u7684\u5b8c\u6574\u6587\u4ef6\u5c06\u4e0e\u4ee5\u4e0b\u5185\u5bb9\u5339\u914d\uff1a<\/p>\n<div>worker-demo\/main.js<\/div>\n<pre class=\"post-pre\"><code><span class=\"token keyword\">const<\/span> blockingBtn <span class=\"token operator\">=<\/span> document<span class=\"token punctuation\">.<\/span><span class=\"token function\">getElementById<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">\"blockbtn\"<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n<span class=\"token keyword\">const<\/span> incrementBtn <span class=\"token operator\">=<\/span> document<span class=\"token punctuation\">.<\/span><span class=\"token function\">getElementById<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">\"incrementbtn\"<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n<span class=\"token keyword\">const<\/span> changeColorBtn <span class=\"token operator\">=<\/span> document<span class=\"token punctuation\">.<\/span><span class=\"token function\">getElementById<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">\"changebtn\"<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n<span class=\"token keyword\">const<\/span> output <span class=\"token operator\">=<\/span> document<span class=\"token punctuation\">.<\/span><span class=\"token function\">querySelector<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">\".output\"<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n<span class=\"token keyword\">const<\/span> totalCountEl <span class=\"token operator\">=<\/span> document<span class=\"token punctuation\">.<\/span><span class=\"token function\">querySelector<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">\".total-count\"<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\ntotalCountEl<span class=\"token punctuation\">.<\/span>textContent <span class=\"token operator\">=<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span>\r\n\r\nincrementBtn<span class=\"token punctuation\">.<\/span><span class=\"token function\">addEventListener<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">\"click\"<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">function<\/span> <span class=\"token function\">incrementValue<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n  <span class=\"token keyword\">let<\/span> counter <span class=\"token operator\">=<\/span> totalCountEl<span class=\"token punctuation\">.<\/span>textContent<span class=\"token punctuation\">;<\/span>\r\n  counter<span class=\"token operator\">++<\/span><span class=\"token punctuation\">;<\/span>\r\n  totalCountEl<span class=\"token punctuation\">.<\/span>textContent <span class=\"token operator\">=<\/span> counter<span class=\"token punctuation\">;<\/span>\r\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n\r\nchangeColorBtn<span class=\"token punctuation\">.<\/span><span class=\"token function\">addEventListener<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">\"click\"<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">function<\/span> <span class=\"token function\">changeBackgroundColor<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n  colors <span class=\"token operator\">=<\/span> <span class=\"token punctuation\">[<\/span><span class=\"token string\">\"#009688\"<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">\"#ffc107\"<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">\"#dadada\"<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span>\r\n  <span class=\"token keyword\">const<\/span> randomIndex <span class=\"token operator\">=<\/span> Math<span class=\"token punctuation\">.<\/span><span class=\"token function\">floor<\/span><span class=\"token punctuation\">(<\/span>Math<span class=\"token punctuation\">.<\/span><span class=\"token function\">random<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">*<\/span> colors<span class=\"token punctuation\">.<\/span>length<span class=\"token punctuation\">)<\/span>\r\n  <span class=\"token keyword\">const<\/span> randomColor <span class=\"token operator\">=<\/span> colors<span class=\"token punctuation\">[<\/span>randomIndex<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span>\r\n  document<span class=\"token punctuation\">.<\/span>body<span class=\"token punctuation\">.<\/span>style<span class=\"token punctuation\">.<\/span>background <span class=\"token operator\">=<\/span> randomColor<span class=\"token punctuation\">;<\/span>\r\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n\r\n<span class=\"token keyword\">function<\/span> <span class=\"token function\">calculateCount<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n  <span class=\"token keyword\">return<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">Promise<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">(<\/span><span class=\"token parameter\">resolve<span class=\"token punctuation\">,<\/span> reject<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">=&gt;<\/span> <span class=\"token punctuation\">{<\/span>\r\n    <span class=\"token keyword\">let<\/span> counter <span class=\"token operator\">=<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">let<\/span> i <span class=\"token operator\">=<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span> i <span class=\"token operator\">&lt;<\/span> <span class=\"token number\">5_000_000_000<\/span><span class=\"token punctuation\">;<\/span> i<span class=\"token operator\">++<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n      counter<span class=\"token operator\">++<\/span><span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token punctuation\">}<\/span>\r\n    <span class=\"token function\">resolve<\/span><span class=\"token punctuation\">(<\/span>counter<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n  <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n<span class=\"token punctuation\">}<\/span>\r\n\r\nblockingBtn<span class=\"token punctuation\">.<\/span><span class=\"token function\">addEventListener<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">\"click\"<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">async<\/span> <span class=\"token keyword\">function<\/span> <span class=\"token function\">blockMainThread<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n  <span class=\"token keyword\">const<\/span> counter <span class=\"token operator\">=<\/span> <span class=\"token keyword\">await<\/span> <span class=\"token function\">calculateCount<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n  output<span class=\"token punctuation\">.<\/span>textContent <span class=\"token operator\">=<\/span> <span class=\"token template-string\"><span class=\"token template-punctuation string\">`<\/span><span class=\"token string\">Result: <\/span><span class=\"token interpolation\"><span class=\"token interpolation-punctuation punctuation\">${<\/span>counter<span class=\"token interpolation-punctuation punctuation\">}<\/span><\/span><span class=\"token template-punctuation string\">`<\/span><\/span><span class=\"token punctuation\">;<\/span>\r\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n<\/code><\/pre>\n<p>\u5b8c\u6210\u66f4\u6539\u540e\uff0c\u4fdd\u5b58\u5e76\u9000\u51fa\u60a8\u7684\u6587\u4ef6\u3002<\/p>\n<p>\u5f53\u60a8\u7684\u670d\u52a1\u5668\u4ecd\u5728\u8fd0\u884c\u65f6\uff0c\u5728\u6d4f\u89c8\u5668\u4e2d\u5237\u65b0http:\/\/localhost:3000\/index.html\u3002\u70b9\u51fb\u589e\u52a0\u548c\u66f4\u6539\u80cc\u666f\u7684\u6309\u94ae\u3002\u4e4b\u540e\uff0c\u70b9\u51fb\u963b\u585e\u4efb\u52a1\u6309\u94ae\uff0c\u7136\u540e\u70b9\u51fb\u5176\u4ed6\u6309\u94ae\u3002\u5f53\u8fd0\u884c\u4e00\u4e2a\u5360\u7528CPU\u7684\u4efb\u52a1\u65f6\uff0c\u5176\u4ed6\u6309\u94ae\u4ecd\u7136\u65e0\u54cd\u5e94\uff0c\u8fd9\u8bc1\u660e\u5c06\u4e00\u4e2a\u5360\u7528CPU\u7684\u4efb\u52a1\u5305\u88c5\u5728\u4e00\u4e2aPromise\u4e2d\u5e76\u4e0d\u4f1a\u4f7f\u4efb\u52a1\u975e\u963b\u585e\u3002<\/p>\n<p>\u65e2\u7136\u4f60\u5df2\u7ecf\u5c1d\u8bd5\u8fc7\u4f7f\u7528\u627f\u8bfa\uff08promises\uff09\u6765\u51cf\u8f7bCPU\u8d1f\u8f7d\u5e76\u6ce8\u610f\u5230\u5176\u5931\u8d25\uff0c\u90a3\u4e48\u4f60\u5c06\u4f7f\u7528Web Workers\u4f7fCPU\u5bc6\u96c6\u578b\u4efb\u52a1\u53d8\u5f97\u975e\u963b\u585e\u3002<\/p>\n<h2>\u7b2c\u4e09\u6b65 &#8211; \u4f7f\u7528Web Workers\u6765\u5378\u8f7dCPU\u5bc6\u96c6\u578b\u4efb\u52a1<\/h2>\n<p>\u5728\u8fd9\u4e00\u6b65\u4e2d\uff0c\u60a8\u5c06\u521b\u5efa\u4e00\u4e2a\u4e13\u7528\u5de5\u4f5c\u7ebf\u7a0b\uff0c\u901a\u8fc7\u5c06CPU\u5bc6\u96c6\u578b\u4efb\u52a1\u79fb\u5165\u4e00\u4e2aworker.js\u6587\u4ef6\u6765\u5378\u8f7d\u8fd9\u4e9b\u4efb\u52a1\u3002\u5728main.js\u6587\u4ef6\u4e2d\uff0c\u60a8\u5c06\u4f7f\u7528worker.js\u6587\u4ef6\u7684\u8def\u5f84\u6765\u5b9e\u4f8b\u5316\u4e00\u4e2a\u4e13\u7528\u7684Web Worker\u3002\u4e00\u65e6Web Worker\u88ab\u521d\u59cb\u5316\uff0cCPU\u5bc6\u96c6\u578b\u4efb\u52a1\u5c06\u4f1a\u88ab\u5378\u8f7d\u5230\u4e00\u4e2a\u72ec\u7acb\u7ebf\u7a0b\uff0c\u800c\u4e3b\u7ebf\u7a0b\u5c06\u4f1a\u81ea\u7531\u5730\u5904\u7406\u5269\u4e0b\u7684\u4efb\u52a1\u3002<\/p>\n<p>\u9996\u5148\uff0c\u521b\u5efa\u4e00\u4e2aworker.js\u6587\u4ef6\u3002<\/p>\n<pre class=\"post-pre\"><code><\/code><\/pre>\n<ol>\n<li data-prefix=\"$\"><span class=\"token function\">nano<\/span> worker.js<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code><\/code><\/pre>\n<p>\u5728\u60a8\u7684worker.js\u6587\u4ef6\u4e2d\uff0c\u6dfb\u52a0\u4ee5\u4e0b\u4ee3\u7801\u4ee5\u5728\u6587\u4ef6\u4e2d\u6dfb\u52a0CPU\u5bc6\u96c6\u578b\u4efb\u52a1\u3002<\/p>\n<div>\u5de5\u4eba\u6f14\u793a\/\u5de5\u4f5c\u8005.js<\/p>\n<pre class=\"post-pre\"><code><span class=\"token keyword\">let<\/span> counter <span class=\"token operator\">=<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span>\r\n<span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">let<\/span> i <span class=\"token operator\">=<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span> i <span class=\"token operator\">&lt;<\/span> <span class=\"token number\">5_000_000_000<\/span><span class=\"token punctuation\">;<\/span> i<span class=\"token operator\">++<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n  counter<span class=\"token operator\">++<\/span><span class=\"token punctuation\">;<\/span>\r\n<span class=\"token punctuation\">}<\/span>\r\n<\/code><\/pre>\n<\/div>\n<p>\u524d\u9762\u7684\u4ee3\u7801\u5757\u5305\u542b\u4e86\u8fc4\u4eca\u4e3a\u6b62\u60a8\u4e00\u76f4\u5728\u4f7f\u7528\u7684CPU\u5bc6\u96c6\u578b\u4efb\u52a1\u3002\u73b0\u5728\u8fd9\u6bb5\u4ee3\u7801\u5c06\u5728\u4e00\u4e2a\u5355\u72ec\u7684\u7ebf\u7a0b\u4e2d\u8fd0\u884c\u3002<\/p>\n<p>\u4e3a\u4e86\u786e\u4fdd\u4e3b\u7ebf\u7a0b\u53ef\u4ee5\u83b7\u53d6\u8ba1\u7b97\u7ed3\u679c\uff0c\u60a8\u9700\u8981\u4f7f\u7528Worker\u63a5\u53e3\u7684postMessage()\u65b9\u6cd5\u53d1\u9001\u5305\u542b\u6570\u636e\u7684\u6d88\u606f\u3002<\/p>\n<p>\u5728\u60a8\u7684worker.js\u6587\u4ef6\u4e2d\uff0c\u6dfb\u52a0\u7a81\u51fa\u663e\u793a\u7684\u884c\u4ee5\u5c06\u6570\u636e\u53d1\u9001\u5230\u4e3b\u7ebf\u7a0b\u3002<\/p>\n<div>\u5de5\u4eba\u6f14\u793a\/\u5de5\u4eba.js<\/p>\n<pre class=\"post-pre\"><code><span class=\"token keyword\">let<\/span> counter <span class=\"token operator\">=<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span>\r\n<span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">let<\/span> i <span class=\"token operator\">=<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span> i <span class=\"token operator\">&lt;<\/span> <span class=\"token number\">5_000_000_000<\/span><span class=\"token punctuation\">;<\/span> i<span class=\"token operator\">++<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n  counter<span class=\"token operator\">++<\/span><span class=\"token punctuation\">;<\/span>\r\n<span class=\"token punctuation\">}<\/span>\r\n<mark><span class=\"token function\">postMessage<\/span><span class=\"token punctuation\">(<\/span>counter<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/mark>\r\n<\/code><\/pre>\n<\/div>\n<p>\u5728\u6b64\u884c\u4ee3\u7801\u4e2d\uff0c\u60a8\u4f7f\u7528\u5305\u542bCPU\u5bc6\u96c6\u578b\u4efb\u52a1\u8ba1\u7b97\u7ed3\u679c\u7684counter\u53d8\u91cf\u8c03\u7528postMessage()\u65b9\u6cd5\u3002<\/p>\n<p>\u4fdd\u5b58\u5e76\u5173\u95ed\u6587\u4ef6\u3002<\/p>\n<p>\u65e2\u7136\u60a8\u5df2\u5c06CPU\u5bc6\u96c6\u578b\u4efb\u52a1\u8f6c\u79fb\u5230\u4e86worker.js\u6587\u4ef6\u4e2d\uff0c\u73b0\u5728\u6253\u5f00main.js\u6587\u4ef6\u3002<\/p>\n<pre class=\"post-pre\"><code><\/code><\/pre>\n<ol>\n<li data-prefix=\"$\"><span class=\"token function\">nano<\/span> main.js<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code><\/code><\/pre>\n<p>\u8bf7\u5220\u9664main.js\u6587\u4ef6\u4e2d\u5305\u542bCPU\u5bc6\u96c6\u578b\u4efb\u52a1\u7684\u7a81\u51fa\u663e\u793a\u884c\u3002<\/p>\n<div>\u5de5\u4eba\u6f14\u793a\/\u4e3b\u8981.js<\/div>\n<pre class=\"post-pre\"><code><span class=\"token operator\">...<\/span>\r\n<mark><span class=\"token keyword\">function<\/span> <span class=\"token function\">calculateCount<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><\/mark>\r\n  <mark><span class=\"token keyword\">return<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">Promise<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">(<\/span><span class=\"token parameter\">resolve<span class=\"token punctuation\">,<\/span> reject<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">=&gt;<\/span> <span class=\"token punctuation\">{<\/span><\/mark>\r\n    <mark><span class=\"token keyword\">let<\/span> counter <span class=\"token operator\">=<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><\/mark>\r\n    <mark><span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">let<\/span> i <span class=\"token operator\">=<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span> i <span class=\"token operator\">&lt;<\/span> <span class=\"token number\">5_000_000_000<\/span><span class=\"token punctuation\">;<\/span> i<span class=\"token operator\">++<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><\/mark>\r\n      <mark>counter<span class=\"token operator\">++<\/span><span class=\"token punctuation\">;<\/span><\/mark>\r\n    <mark><span class=\"token punctuation\">}<\/span><\/mark>\r\n    <mark><span class=\"token function\">resolve<\/span><span class=\"token punctuation\">(<\/span>counter<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/mark>\r\n  <mark><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/mark>\r\n<mark><span class=\"token punctuation\">}<\/span><\/mark>\r\n\r\nblockingBtn<span class=\"token punctuation\">.<\/span><span class=\"token function\">addEventListener<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">\"click\"<\/span><span class=\"token punctuation\">,<\/span> <mark><span class=\"token keyword\">async<\/span><\/mark> <span class=\"token keyword\">function<\/span> <span class=\"token function\">blockMainThread<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n  <mark><span class=\"token keyword\">const<\/span> counter <span class=\"token operator\">=<\/span> <span class=\"token keyword\">await<\/span> <span class=\"token function\">calculateCount<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/mark>\r\n  output<span class=\"token punctuation\">.<\/span>textContent <span class=\"token operator\">=<\/span> <span class=\"token template-string\"><span class=\"token template-punctuation string\">`<\/span><span class=\"token string\">\u7ed3\u679c: <\/span><span class=\"token interpolation\"><span class=\"token interpolation-punctuation punctuation\">${<\/span><mark>counter<\/mark><span class=\"token interpolation-punctuation punctuation\">}<\/span><\/span><span class=\"token template-punctuation string\">`<\/span><\/span><span class=\"token punctuation\">;<\/span>\r\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n\r\n<\/code><\/pre>\n<p>\u5728<code>blockMainThread<\/code>\u56de\u8c03\u4e2d\uff0c\u6dfb\u52a0\u4ee5\u4e0b\u7a81\u51fa\u663e\u793a\u7684\u4ee3\u7801\u6765\u521d\u59cb\u5316\u5de5\u4f5c\u7ebf\u7a0b\u5e76\u76d1\u542c\u5de5\u4f5c\u7ebf\u7a0b\u7684\u6d88\u606f\u3002<\/p>\n<div>worker-demo\/main.js<\/div>\n<pre class=\"post-pre\"><code>blockingBtn<span class=\"token punctuation\">.<\/span><span class=\"token function\">addEventListener<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">\"click\"<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">function<\/span> <span class=\"token function\">blockMainThread<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n  <mark><span class=\"token keyword\">const<\/span> worker <span class=\"token operator\">=<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">Worker<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">\"worker.js\"<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/mark>\r\n  <mark>worker<span class=\"token punctuation\">.<\/span><span class=\"token function-variable function\">onmessage<\/span> <span class=\"token operator\">=<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token parameter\">msg<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">=&gt;<\/span> <span class=\"token punctuation\">{<\/span><\/mark>\r\n    output<span class=\"token punctuation\">.<\/span>textContent <span class=\"token operator\">=<\/span> <span class=\"token template-string\"><span class=\"token template-punctuation string\">`<\/span><span class=\"token string\">\u7ed3\u679c: <\/span><span class=\"token interpolation\"><span class=\"token interpolation-punctuation punctuation\">${<\/span><mark>msg<span class=\"token punctuation\">.<\/span>data<\/mark><span class=\"token interpolation-punctuation punctuation\">}<\/span><\/span><span class=\"token template-punctuation string\">`<\/span><\/span><span class=\"token punctuation\">;<\/span>\r\n  <mark><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/mark>\r\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n<\/code><\/pre>\n<p>\u9996\u5148\uff0c\u60a8\u4f7f\u7528\u4e4b\u524d\u521b\u5efa\u7684worker.js\u6587\u4ef6\u7684\u8def\u5f84\u521b\u5efa\u4e86\u4e00\u4e2aWorker\u5b9e\u4f8b\u3002\u5176\u6b21\uff0c\u60a8\u5c06Worker\u63a5\u53e3\u7684onmessage\u5c5e\u6027\u9644\u52a0\u5230\u5de5\u4f5c\u7ebf\u7a0b\u4e0a\uff0c\u4ee5\u4fbf\u76d1\u542c\u6765\u81ea\u5de5\u4f5c\u7ebf\u7a0b\u7684\u4efb\u4f55\u6d88\u606f\u3002\u5982\u679c\u6709\u6d88\u606f\u8fdb\u6765\uff0c\u5c31\u4f1a\u89e6\u53d1\u6d88\u606f\u4e8b\u4ef6\uff0c\u8c03\u7528\u56de\u8c03\u51fd\u6570\u5e76\u5c06\u6d88\u606f\u6570\u636emsg\u4f5c\u4e3a\u53c2\u6570\u4f20\u9012\u3002\u5728\u56de\u8c03\u51fd\u6570\u4e2d\uff0c\u60a8\u4f7f\u7528\u6765\u81eaWeb Worker\u7684\u6d88\u606f\u4fee\u6539\u8f93\u51fa\u6587\u672c\u7684\u5185\u5bb9\u3002<\/p>\n<p>\u5b8c\u6574\u7684\u6587\u4ef6\u73b0\u5728\u5c06\u4e0e\u4ee5\u4e0b\u4ee3\u7801\u5757\u76f8\u5339\u914d\u3002<\/p>\n<div>Web Worker\u6f14\u793a\/\u4e3b.js<\/div>\n<pre class=\"post-pre\"><code><span class=\"token keyword\">const<\/span> blockingBtn <span class=\"token operator\">=<\/span> document<span class=\"token punctuation\">.<\/span><span class=\"token function\">getElementById<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">\"blockbtn\"<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n<span class=\"token keyword\">const<\/span> incrementBtn <span class=\"token operator\">=<\/span> document<span class=\"token punctuation\">.<\/span><span class=\"token function\">getElementById<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">\"incrementbtn\"<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n<span class=\"token keyword\">const<\/span> changeColorBtn <span class=\"token operator\">=<\/span> document<span class=\"token punctuation\">.<\/span><span class=\"token function\">getElementById<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">\"changebtn\"<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n<span class=\"token keyword\">const<\/span> output <span class=\"token operator\">=<\/span> document<span class=\"token punctuation\">.<\/span><span class=\"token function\">querySelector<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">\".output\"<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n<span class=\"token keyword\">const<\/span> totalCountEl <span class=\"token operator\">=<\/span> document<span class=\"token punctuation\">.<\/span><span class=\"token function\">querySelector<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">\".total-count\"<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\ntotalCountEl<span class=\"token punctuation\">.<\/span>textContent <span class=\"token operator\">=<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span>\r\n\r\nincrementBtn<span class=\"token punctuation\">.<\/span><span class=\"token function\">addEventListener<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">\"click\"<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">function<\/span> <span class=\"token function\">incrementValue<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n  <span class=\"token keyword\">let<\/span> counter <span class=\"token operator\">=<\/span> totalCountEl<span class=\"token punctuation\">.<\/span>textContent<span class=\"token punctuation\">;<\/span>\r\n  counter<span class=\"token operator\">++<\/span><span class=\"token punctuation\">;<\/span>\r\n  totalCountEl<span class=\"token punctuation\">.<\/span>textContent <span class=\"token operator\">=<\/span> counter<span class=\"token punctuation\">;<\/span>\r\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n\r\nchangeColorBtn<span class=\"token punctuation\">.<\/span><span class=\"token function\">addEventListener<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">\"click\"<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">function<\/span> <span class=\"token function\">changeBackgroundColor<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n  colors <span class=\"token operator\">=<\/span> <span class=\"token punctuation\">[<\/span><span class=\"token string\">\"#009688\"<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">\"#ffc107\"<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">\"#dadada\"<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span>\r\n  <span class=\"token keyword\">const<\/span> randomIndex <span class=\"token operator\">=<\/span> Math<span class=\"token punctuation\">.<\/span><span class=\"token function\">floor<\/span><span class=\"token punctuation\">(<\/span>Math<span class=\"token punctuation\">.<\/span><span class=\"token function\">random<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">*<\/span> colors<span class=\"token punctuation\">.<\/span>length<span class=\"token punctuation\">)<\/span>\r\n  <span class=\"token keyword\">const<\/span> randomColor <span class=\"token operator\">=<\/span> colors<span class=\"token punctuation\">[<\/span>randomIndex<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span>\r\n  document<span class=\"token punctuation\">.<\/span>body<span class=\"token punctuation\">.<\/span>style<span class=\"token punctuation\">.<\/span>background <span class=\"token operator\">=<\/span> randomColor<span class=\"token punctuation\">;<\/span>\r\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n\r\nblockingBtn<span class=\"token punctuation\">.<\/span><span class=\"token function\">addEventListener<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">\"click\"<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">function<\/span> <span class=\"token function\">blockMainThread<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n  <span class=\"token keyword\">const<\/span> worker <span class=\"token operator\">=<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">Worker<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">\"worker.js\"<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n  worker<span class=\"token punctuation\">.<\/span><span class=\"token function-variable function\">onmessage<\/span> <span class=\"token operator\">=<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token parameter\">msg<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">=><\/span> <span class=\"token punctuation\">{<\/span>\r\n    output<span class=\"token punctuation\">.<\/span>textContent <span class=\"token operator\">=<\/span> <span class=\"token template-string\"><span class=\"token template-punctuation string\">`<\/span><span class=\"token string\">\u7ed3\u679c\uff1a<\/span><span class=\"token interpolation\"><span class=\"token interpolation-punctuation punctuation\">${<\/span>msg<span class=\"token punctuation\">.<\/span>data<span class=\"token interpolation-punctuation punctuation\">}<\/span><\/span><span class=\"token template-punctuation string\">`<\/span><\/span><span class=\"token punctuation\">;<\/span>\r\n  <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span>\r\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n<\/code><\/pre>\n<p>\u4fdd\u5b58\u5e76\u9000\u51fa\u6587\u4ef6\u3002<\/p>\n<p>\u5728\u670d\u52a1\u5668\u8fd0\u884c\u65f6\uff0c\u8fd4\u56de\u5230\u60a8\u7684\u7f51\u7edc\u6d4f\u89c8\u5668\u5e76\u8bbf\u95eehttp:\/\/localhost:3000\/index.html\u3002\u9875\u9762\u5c06\u6210\u529f\u4ece\u670d\u52a1\u5668\u52a0\u8f7d\u3002<\/p>\n<p>\u9996\u5148\uff0c\u70b9\u51fb\u9012\u589e\u548c\u66f4\u6539\u80cc\u666f\u6309\u94ae\u51e0\u6b21\u3002\u5176\u6b21\uff0c\u70b9\u51fb\u963b\u585e\u4efb\u52a1\u6309\u94ae\u6765\u542f\u52a8\u9700\u8981\u5927\u91cfCPU\u8d44\u6e90\u7684\u4efb\u52a1\uff0c\u7136\u540e\u7ee7\u7eed\u70b9\u51fb\u5176\u4ed6\u7684\u6309\u94ae\u3002\u5c3d\u7ba1CPU\u5bc6\u96c6\u578b\u4efb\u52a1\u4ecd\u5728\u6267\u884c\uff0c\u4f46\u8fd9\u4e9b\u6309\u94ae\u73b0\u5728\u80fd\u6b63\u5e38\u5de5\u4f5c\u3002<\/p>\n<p>\u60a8\u73b0\u5728\u53ef\u4ee5\u4f7f\u7528\u4e00\u4e2a\u4e13\u95e8\u7684Web Worker\u6765\u5378\u8f7d\u4e00\u4e2aCPU\u5bc6\u96c6\u578b\u4efb\u52a1\uff0c\u4f7f\u4e4b\u6210\u4e3a\u975e\u963b\u585e\u7684\u3002<\/p>\n<h2>\u603b\u7ed3<\/h2>\n<p>\u5728\u8fd9\u4e2a\u6559\u7a0b\u4e2d\uff0c\u60a8\u521b\u5efa\u4e86\u4e00\u4e2a\u542f\u52a8CPU\u5bc6\u96c6\u578b\u4efb\u52a1\u5e76\u963b\u585e\u4e3b\u7ebf\u7a0b\u7684\u5e94\u7528\u7a0b\u5e8f\uff0c\u5e76\u5c1d\u8bd5\u4f7f\u7528Promise\u4f7fCPU\u5bc6\u96c6\u578b\u4efb\u52a1\u975e\u963b\u585e\uff0c\u4f46\u672a\u80fd\u6210\u529f\u3002\u6700\u540e\uff0c\u60a8\u4f7f\u7528\u4e86\u4e00\u4e2a\u4e13\u7528\u7684Web Worker\u5c06CPU\u5bc6\u96c6\u578b\u4efb\u52a1\u8f6c\u79fb\u5230\u53e6\u4e00\u4e2a\u7ebf\u7a0b\uff0c\u4f7f\u5176\u53d8\u5f97\u975e\u963b\u585e\u3002<\/p>\n<p>\u4f5c\u4e3a\u4e0b\u4e00\u6b65\uff0c\u60a8\u53ef\u4ee5\u8bbf\u95ee<strong>Web Workers API<\/strong>\u6587\u6863\uff0c\u5168\u9762\u4e86\u89e3\u4e13\u7528Web Workers\u3002\u9664\u4e86\u4e13\u7528Web Workers\uff0cWeb Workers API\u8fd8\u5305\u542b\u5171\u4eabWeb Workers\uff08Shared Workers\uff09\u548c\u670d\u52a1Web Workers\uff08Service Workers\uff09\uff0c\u53ef\u4ee5\u7528\u4e8e\u63d0\u4f9b\u79bb\u7ebf\u8bbf\u95ee\u548c\u63d0\u5347\u6027\u80fd\u3002<\/p>\n<p>\u5982\u679c\u60a8\u4f7f\u7528Node.js\uff0c\u60a8\u53ef\u4ee5\u5b66\u4e60\u5982\u4f55\u5728\u300a<a href=\"#\">\u5982\u4f55\u4f7f\u7528Node.js\u8fdb\u884c\u591a\u7ebf\u7a0b\u7f16\u7a0b<\/a>\u300b\u4e2d\u4f7f\u7528\u5de5\u4f5c\u7ebf\u7a0b\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4f5c\u8005\u9009\u62e9\u5c06&#8221;Girls Who Code&#8221;\u4f5c\u4e3a&#8221;\u5199\u4f5c\u7b79\u6b3e\u8ba1\u5212&#8221; [&hellip;]<\/p>\n","protected":false},"author":9,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[1356,1354,1353,1355,973],"class_list":["post-431","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-cpu","tag-javascript","tag-web-workers","tag-1355","tag-973"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>\u63d0\u5347\u524d\u7aef\u6027\u80fd\uff1a\u4f7f\u7528Web Workers\u5904\u7406CPU\u5bc6\u96c6\u578b\u4efb\u52a1 - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"\u4e86\u89e3\u5982\u4f55\u4f7f\u7528Web Workers\u6280\u672f\u4f18\u5316JavaScript\u5e94\u7528\u6027\u80fd\uff0c\u6709\u6548\u5904\u7406CPU\u5bc6\u96c6\u578b\u4efb\u52a1\u3002\u672c\u6559\u7a0b\u8be6\u7ec6\u4ecb\u7ecdWeb 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