{"id":44336,"date":"2022-12-07T17:14:34","date_gmt":"2023-08-03T15:48:12","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/golang%e8%bd%ac%e4%b9%89%e5%88%86%e6%9e%90\/"},"modified":"2024-04-29T04:10:14","modified_gmt":"2024-04-28T20:10:14","slug":"golang%e8%bd%ac%e4%b9%89%e5%88%86%e6%9e%90","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/golang%e8%bd%ac%e4%b9%89%e5%88%86%e6%9e%90\/","title":{"rendered":"Golang\u8f6c\u4e49\u5206\u6790"},"content":{"rendered":"

\u9996\u5148<\/h1>\n

Go\u53ef\u4ee5\u5f88\u597d\u5730\u5904\u7406\u5806\u6808\u548c\u5806\u5185\u5b58\u3002<\/p>\n

\u4f46\u662f\uff0c\u7531\u4e8e\u6808\u6bd4\u5806\u66f4\u5feb\uff0c\u6240\u4ee5\u5c3d\u91cf\u5e0c\u671b\u4f7f\u7528\u6808\u3002<\/p>\n

\u56e0\u6b64\uff0c\u6211\u4eec\u53ef\u4ee5\u5c1d\u8bd5\u51cf\u5c11\u5806\u5206\u914d\uff0c\u5e76\u540c\u65f6\u6ce8\u610f\u8f6c\u4e49\u5206\u6790\u3002<\/p>\n

\u9003\u9038\u5206\u6790\u662f\u4ec0\u4e48\uff1f<\/p>\n

\u8f93\u51fa\u9003\u9038\u5206\u6790<\/h1>\n
go build gcflags=\"-m -l\" sample.go\r\ngo test gcflags=\"-m -l\" -bench=.\r\n<\/code><\/pre>\n
-m \u30a8\u30b9\u30b1\u30fc\u30d7\u89e3\u6790\u3092\u51fa\u529b<\/p>\n
-l \u95a2\u6570\u306e\u30a4\u30f3\u30e9\u30a4\u30f3\u5316\u3092\u30aa\u30d5\u306b\u3059\u308b \uff08\u4eca\u56de\u306f\u3088\u308a\u7c21\u5358\u306a\u4f8b\u3067\u8aac\u660e\u3057\u305f\u3044\u306e\u3067\u30aa\u30d5\u306b\u3059\u308b\u3002\u30a4\u30f3\u30e9\u30a4\u30f3\u5316\u306e\u5f71\u97ff\u3067\u30a8\u30b9\u30b1\u30fc\u30d7\u3055\u308c\u306a\u3044\u3053\u3068\u304c\u3042\u308b\u306e\u3067\uff09<\/p>\n
\u5b9e\u8df5<\/h1>\n
\u4ee5\u4e0b\u4e3a\u4f8b1\u7684\u4e2d\u6587\u672c\u5730\u5316\u91ca\u4e49\uff1a
\n\u4f8b1\uff1a- “I went to the supermarket to buy some groceries yesterday.”
\n\u6211\u6628\u5929\u53bb\u4e86\u8d85\u5e02\u4e70\u4e86\u4e00\u4e9b\u98df\u54c1\u6742\u8d27\u3002<\/h2>\n
\u6211\u5c06\u9996\u5148\u6267\u884c\u4e0b\u9762\u7684\u57fa\u51c6\u6d4b\u8bd5\u3002<\/p>\n
package<\/span> main<\/span>\r\n\r\nimport<\/span> \"testing\"<\/span>\r\n\r\nfunc<\/span> Escape<\/span>()<\/span> *<\/span>int<\/span> {<\/span>\r\n    v<\/span> :=<\/span> 1000<\/span>\r\n    return<\/span> &<\/span>v<\/span>\r\n}<\/span>\r\n\r\nfunc<\/span> NoEscape<\/span>()<\/span> int<\/span> {<\/span>\r\n    v<\/span> :=<\/span> 1000<\/span>\r\n    return<\/span> v<\/span>\r\n}<\/span>\r\n\r\nfunc<\/span> BenchmarkEscape<\/span>(<\/span>b<\/span> *<\/span>testing<\/span>.<\/span>B<\/span>)<\/span> {<\/span>\r\n    for<\/span> i<\/span> :=<\/span> 0<\/span>;<\/span> i<\/span> <<\/span> b<\/span>.<\/span>N<\/span>;<\/span> i<\/span>++<\/span> {<\/span>\r\n        _<\/span> =<\/span> Escape<\/span>()<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n\r\nfunc<\/span> BenchmarkNoEscape<\/span>(<\/span>b<\/span> *<\/span>testing<\/span>.<\/span>B<\/span>)<\/span> {<\/span>\r\n    for<\/span> i<\/span> :=<\/span> 0<\/span>;<\/span> i<\/span> <<\/span> b<\/span>.<\/span>N<\/span>;<\/span> i<\/span>++<\/span> {<\/span>\r\n        _<\/span> =<\/span> NoEscape<\/span>()<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u7ed3\u679c\u2193<\/p>\n
\r\n$<\/span> go test<\/span> -bench<\/span>=<\/span>.<\/span> -gcflags<\/span> \"-m -l\"<\/span>\r\n#<\/span> github.com\/Kooooya\/ground\/escape_analysis\r\n.\/01_test.go:7: &v escapes to heap\r\n.\/01_test.go:6: moved to heap: v\r\n<\/span>.....\r\n<\/span>BenchmarkNoEscape-4     2000000000           1.57 ns\/op\r\nBenchmarkEscape-4       100000000           15.3 ns\/op\r\n<\/span><\/code><\/pre>\n
\u9003\u907f\u7684\u901f\u5ea6\u6bd4\u8f83\u6162\u5927\u7ea6\u5341\u500d\u3002<\/p>\n
.\/01_test.go:7: &v escapes to heap\r\n.\/01_test.go:6: moved to heap: v\r\n<\/code><\/pre>\n
\u8fd9\u662f\u4e00\u4e2a\u5173\u4e8e\u5c06v\u5206\u914d\uff08\u9003\u9038\uff09\u5230\u5806\u4e0a\u7684\u65e5\u5fd7\u3002
\n\u5982\u679c\u6ca1\u6709\u5c06\u5176\u5206\u914d\u5230\u5806\u4e0a\uff0cBenchmarkEscape\u5c06\u65e0\u6cd5\u5f15\u7528\u7b2c6\u884c\u7684v\u7684\u503c\u3002<\/p>\n
\u8bf7\u95ee\u60a8\u80fd\u4ee5\u4e2d\u6587\u6bcd\u8bed\u8fdb\u884c\u518d\u6b21\u89e3\u91ca\u5417\uff1f\u53ea\u9700\u4e00\u79cd\u9009\u9879\u3002<\/h2>\n
\r\npackage<\/span> main<\/span>\r\n\r\nimport<\/span> \"testing\"<\/span>\r\n\r\nfunc<\/span> Escape<\/span>()<\/span> *<\/span>int<\/span> {<\/span>\r\n        s<\/span> :=<\/span> []<\/span>int<\/span>{<\/span>1<\/span>,<\/span> 2<\/span>,<\/span> 3<\/span>,<\/span> 4<\/span>,<\/span> 5<\/span>}<\/span>\r\n        y<\/span> :=<\/span> &<\/span>s<\/span>[<\/span>0<\/span>]<\/span>\r\n        return<\/span> y<\/span>\r\n}<\/span>\r\n\r\nfunc<\/span> NoEscape<\/span>()<\/span> int<\/span> {<\/span>\r\n        s<\/span> :=<\/span> []<\/span>int<\/span>{<\/span>1<\/span>,<\/span> 2<\/span>,<\/span> 3<\/span>,<\/span> 4<\/span>,<\/span> 5<\/span>}<\/span>\r\n        y<\/span> :=<\/span> s<\/span>[<\/span>0<\/span>]<\/span>\r\n        return<\/span> y<\/span>\r\n}<\/span>\r\n\r\nfunc<\/span> BenchmarkEscape<\/span>(<\/span>b<\/span> *<\/span>testing<\/span>.<\/span>B<\/span>)<\/span> {<\/span>\r\n        for<\/span> i<\/span> :=<\/span> 0<\/span>;<\/span> i<\/span> <<\/span> b<\/span>.<\/span>N<\/span>;<\/span> i<\/span>++<\/span> {<\/span>\r\n                Escape<\/span>()<\/span>\r\n        }<\/span>\r\n}<\/span>\r\n\r\nfunc<\/span> BenchmarkNoEscape<\/span>(<\/span>b<\/span> *<\/span>testing<\/span>.<\/span>B<\/span>)<\/span> {<\/span>\r\n        for<\/span> i<\/span> :=<\/span> 0<\/span>;<\/span> i<\/span> <<\/span> b<\/span>.<\/span>N<\/span>;<\/span> i<\/span>++<\/span> {<\/span>\r\n                NoEscape<\/span>()<\/span>\r\n        }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
# command-line-arguments\r\n.\/02_test.go:7: &s[0] escapes to heap\r\n.\/02_test.go:6: []int literal escapes to heap\r\n.\/02_test.go:12: NoEscape []int literal does not escape\r\n.....\r\nBenchmarkEscape-4       50000000            27.9 ns\/op\r\nBenchmarkNoEscape-4     500000000            3.33 ns\/op\r\n<\/code><\/pre>\n
\u5dee\u8ddd\u5927\u7ea6\u4e3a8\u500d\u5de6\u53f3\u3002
\n\u503c\u5f97\u6ce8\u610f\u7684\u662f<\/p>\n
.\/02_test.go:7: &s[0] escapes to heap\r\n.\/02_test.go:6: []int literal escapes to heap\r\n<\/code><\/pre>\n
\u5207\u7247\u5df2\u7ecf\u88ab\u8f6c\u4e49\u3002
\n\u5728Go\u8bed\u8a00\u4e2d\uff0c\u5982\u679c\u5207\u7247\u4e2d\u7684\u4efb\u4f55\u4e00\u4e2a\u5143\u7d20\u88ab\u8f6c\u4e49\uff0c\u6574\u4e2a\u5207\u7247\u90fd\u4f1a\u88ab\u8f6c\u4e49\u3002<\/p>\n
\u56e0\u6b64\uff0c\u53ef\u4ee5\u5c06\u51fd\u6570\u8fd4\u56de\u503c\u4e0e\u5207\u7247\u7684\u5143\u7d20\u653e\u5165\u51fd\u6570\u7684\u5c40\u90e8\u53d8\u91cf\u4e2d\uff0c\u5e76\u5c06\u8be5\u6307\u9488\u8fd4\u56de\uff0c\u4ee5\u51cf\u5c11\u9003\u9038\u503c\u7684\u5927\u5c0f\uff0c\u4ece\u800c\u63d0\u9ad8\u901f\u5ea6\u3002<\/p>\n
\r\npackage<\/span> main<\/span>\r\n\r\nimport<\/span> \"testing\"<\/span>\r\n\r\nfunc<\/span> LittleEscape<\/span>()<\/span> *<\/span>int<\/span> {<\/span>\r\n    s<\/span> :=<\/span> []<\/span>int<\/span>{<\/span>1<\/span>,<\/span> 2<\/span>,<\/span> 3<\/span>,<\/span> 4<\/span>,<\/span> 5<\/span>,<\/span> 6<\/span>,<\/span> 7<\/span>,<\/span> 8<\/span>,<\/span> 9<\/span>,<\/span> 10<\/span>,<\/span> 1<\/span>,<\/span> 2<\/span>,<\/span> 3<\/span>,<\/span> 4<\/span>,<\/span> 5<\/span>,<\/span> 6<\/span>,<\/span> 7<\/span>,<\/span> 8<\/span>,<\/span> 9<\/span>,<\/span> 10<\/span>,<\/span> 1<\/span>,<\/span> 2<\/span>,<\/span> 3<\/span>,<\/span> 4<\/span>,<\/span> 5<\/span>,<\/span> 6<\/span>,<\/span> 7<\/span>,<\/span> 8<\/span>,<\/span> 9<\/span>,<\/span> 10<\/span>,<\/span> 1<\/span>,<\/span> 2<\/span>,<\/span> 3<\/span>,<\/span>......<\/span>}<\/span>\r\n    y<\/span> :=<\/span> s<\/span>[<\/span>0<\/span>]<\/span>\r\n    return<\/span> &<\/span>y<\/span>\r\n}<\/span>\r\n\r\nfunc<\/span> Escape<\/span>()<\/span> *<\/span>int<\/span> {<\/span>\r\n    s<\/span> :=<\/span> []<\/span>int<\/span>{<\/span>1<\/span>,<\/span> 2<\/span>,<\/span> 3<\/span>,<\/span> 4<\/span>,<\/span> 5<\/span>,<\/span> 6<\/span>,<\/span> 7<\/span>,<\/span> 8<\/span>,<\/span> 9<\/span>,<\/span> 10<\/span>,<\/span> 1<\/span>,<\/span> 2<\/span>,<\/span> 3<\/span>,<\/span> 4<\/span>,<\/span> 5<\/span>,<\/span> 6<\/span>,<\/span> 7<\/span>,<\/span> 8<\/span>,<\/span> 9<\/span>,<\/span> 10<\/span>,<\/span> 1<\/span>,<\/span> 2<\/span>,<\/span> 3<\/span>,<\/span> 4<\/span>,<\/span> 5<\/span>,<\/span> 6<\/span>,<\/span> 7<\/span>,<\/span> 8<\/span>,<\/span> 9<\/span>,<\/span> 10<\/span>,<\/span> 1<\/span>,<\/span> 2<\/span>,<\/span> 3<\/span>,<\/span>......<\/span>}<\/span>\r\n    return<\/span> &<\/span>s<\/span>[<\/span>0<\/span>]<\/span>\r\n}<\/span>\r\n\r\nfunc<\/span> BenchmarkLitteEscape<\/span>(<\/span>b<\/span> *<\/span>testing<\/span>.<\/span>B<\/span>)<\/span> {<\/span>\r\n    for<\/span> i<\/span> :=<\/span> 0<\/span>;<\/span> i<\/span> <<\/span> b<\/span>.<\/span>N<\/span>;<\/span> i<\/span>++<\/span> {<\/span>\r\n        LittleEscape<\/span>()<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n\r\nfunc<\/span> BenchmarkEscape<\/span>(<\/span>b<\/span> *<\/span>testing<\/span>.<\/span>B<\/span>)<\/span> {<\/span>\r\n    for<\/span> i<\/span> :=<\/span> 0<\/span>;<\/span> i<\/span> <<\/span> b<\/span>.<\/span>N<\/span>;<\/span> i<\/span>++<\/span> {<\/span>\r\n        Escape<\/span>()<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
.\/02_test.go:8: &y escapes to heap\r\n.\/02_test.go:7: moved to heap: y\r\n.\/02_test.go:6: LittleEscape []int literal does not escape\r\n.\/02_test.go:13: &s[0] escapes to heap\r\n.\/02_test.go:12: []int literal escapes to heap\r\n.....\r\nBenchmarkLitteEscape-4        500000          3104 ns\/op\r\nBenchmarkEscape-4             100000         11782 ns\/op\r\n<\/code><\/pre>\n
\u8bf7\u539f\u751f\u4e2d\u6587\u7ffb\u8bd1\u4ee5\u4e0b\u5185\u5bb9\uff0c\u53ea\u9700\u8981\u4e00\u79cd\u9009\u9879:<\/h2>\n
Example 3<\/p>\n
\u5728map\u4e2d\u8bbe\u7f6e\u7684\u6307\u9488\u80af\u5b9a\u4f1a\u88ab\u9003\u9038\u3002<\/p>\n
\r\npackage<\/span> main<\/span>\r\n\r\nimport<\/span> \"testing\"<\/span>\r\n\r\nfunc<\/span> Escape<\/span>()<\/span> {<\/span>\r\n    s<\/span> :=<\/span> map<\/span>[<\/span>string<\/span>]<\/span>*<\/span>int<\/span>{}<\/span>\r\n    i<\/span> :=<\/span> 1<\/span>\r\n    s<\/span>[<\/span>\"a\"<\/span>]<\/span> =<\/span> &<\/span>i<\/span>\r\n}<\/span>\r\n\r\nfunc<\/span> NoEscape<\/span>()<\/span> {<\/span>\r\n    s<\/span> :=<\/span> map<\/span>[<\/span>string<\/span>]<\/span>int<\/span>{}<\/span>\r\n    i<\/span> :=<\/span> 1<\/span>\r\n    s<\/span>[<\/span>\"a\"<\/span>]<\/span> =<\/span> i<\/span>\r\n}<\/span>\r\n\r\nfunc<\/span> BenchmarkEscape<\/span>(<\/span>b<\/span> *<\/span>testing<\/span>.<\/span>B<\/span>)<\/span> {<\/span>\r\n    for<\/span> i<\/span> :=<\/span> 0<\/span>;<\/span> i<\/span> <<\/span> b<\/span>.<\/span>N<\/span>;<\/span> i<\/span>++<\/span> {<\/span>\r\n        Escape<\/span>()<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n\r\nfunc<\/span> BenchmarkNoEscape<\/span>(<\/span>b<\/span> *<\/span>testing<\/span>.<\/span>B<\/span>)<\/span> {<\/span>\r\n    for<\/span> i<\/span> :=<\/span> 0<\/span>;<\/span> i<\/span> <<\/span> b<\/span>.<\/span>N<\/span>;<\/span> i<\/span>++<\/span> {<\/span>\r\n        NoEscape<\/span>()<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n\r\n<\/code><\/pre>\n
.\/04_test.go:8: &i escapes to heap\r\n.\/04_test.go:7: moved to heap: i\r\n.\/04_test.go:6: Escape map[string]*int literal does not escape\r\n.\/04_test.go:12: NoEscape map[string]int literal does not escape\r\n.....\r\nBenchmarkEscape-4       10000000           203 ns\/op\r\nBenchmarkNoEscape-4     10000000           188 ns\/op\r\n<\/code><\/pre>\n
\u8bf7\u63d0\u4f9b\u5177\u4f53\u7684\u4e0a\u4e0b\u6587\u6216\u539f\u6587\uff0c\u4ee5\u4fbf\u6b63\u786e\u7406\u89e3\u60a8\u7684\u8bf7\u6c42\u3002<\/h2>\n
\u65e0\u8bba\u662f\u5728 slice \u4e2d\u8fd8\u662f\u5728\u8bbe\u5b9a\u6307\u9488\u65f6\uff0c\u6307\u9488\u90fd\u4f1a\u88ab\u786e\u4fdd\u9003\u9038\u3002<\/p>\n
\r\npackage<\/span> main<\/span>\r\n\r\nimport<\/span> \"testing\"<\/span>\r\n\r\nfunc<\/span> Escape<\/span>()<\/span> {<\/span>\r\n    s<\/span> :=<\/span> make<\/span>([]<\/span>*<\/span>int<\/span>,<\/span> 1<\/span>)<\/span>\r\n    i<\/span> :=<\/span> 1<\/span>\r\n    s<\/span>[<\/span>0<\/span>]<\/span> =<\/span> &<\/span>i<\/span>\r\n}<\/span>\r\n\r\nfunc<\/span> NoEscape<\/span>()<\/span> {<\/span>\r\n    s<\/span> :=<\/span> make<\/span>([]<\/span>int<\/span>,<\/span> 1<\/span>)<\/span>\r\n    i<\/span> :=<\/span> 1<\/span>\r\n    s<\/span>[<\/span>0<\/span>]<\/span> =<\/span> i<\/span>\r\n}<\/span>\r\n\r\nfunc<\/span> BenchmarkEscape<\/span>(<\/span>b<\/span> *<\/span>testing<\/span>.<\/span>B<\/span>)<\/span> {<\/span>\r\n    for<\/span> i<\/span> :=<\/span> 0<\/span>;<\/span> i<\/span> <<\/span> b<\/span>.<\/span>N<\/span>;<\/span> i<\/span>++<\/span> {<\/span>\r\n        Escape<\/span>()<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n\r\nfunc<\/span> BenchmarkNoEscape<\/span>(<\/span>b<\/span> *<\/span>testing<\/span>.<\/span>B<\/span>)<\/span> {<\/span>\r\n    for<\/span> i<\/span> :=<\/span> 0<\/span>;<\/span> i<\/span> <<\/span> b<\/span>.<\/span>N<\/span>;<\/span> i<\/span>++<\/span> {<\/span>\r\n        NoEscape<\/span>()<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
.....\r\n.\/05_test.go:8: &i escapes to heap\r\n.\/05_test.go:7: moved to heap: i\r\n.\/05_test.go:6: Escape make([]*int, 1) does not escape\r\n.\/05_test.go:12: NoEscape make([]int, 1) does not escape\r\n.....\r\nBenchmarkEscape-4       100000000           21.0 ns\/op\r\nBenchmarkNoEscape-4     300000000            4.72 ns\/op\r\n<\/code><\/pre>\n
\u8fd9\u91cc\u8fd8\u662f\u76f8\u5f53\u4e0d\u540c\u554a\u3002<\/p>\n
\u8bf7\u63d0\u4f9b\u5b8c\u6574\u7684\u4f8b\uff15\u7684\u6587\u672c\uff0c\u7136\u540e\u6211\u53ef\u4ee5\u4e3a\u60a8\u8fdb\u884c\u9002\u5f53\u7684\u4e2d\u6587\u8f6c\u8ff0\u3002<\/h2>\n
\u5373\u4f7f\u662f\u5728\u7ed3\u6784\u4f53\u7684\u5b57\u6bb5\u4e2d\uff0c\u4e5f\u4f1a\u53d1\u751f\u8f6c\u4e49\u3002<\/p>\n
\r\npackage<\/span> main<\/span>\r\n\r\nimport<\/span> \"testing\"<\/span>\r\n\r\ntype<\/span> S<\/span> struct<\/span> {<\/span>\r\n    M<\/span> *<\/span>int<\/span>\r\n}<\/span>\r\n\r\nfunc<\/span> Escape<\/span>(<\/span>y<\/span> int<\/span>)<\/span> (<\/span>z<\/span> S<\/span>)<\/span> {<\/span>\r\n    z<\/span>.<\/span>M<\/span> =<\/span> &<\/span>y<\/span>\r\n    return<\/span> z<\/span>\r\n}<\/span>\r\n\r\nfunc<\/span> NoEscape<\/span>(<\/span>y<\/span> *<\/span>int<\/span>)<\/span> (<\/span>z<\/span> S<\/span>)<\/span> {<\/span>\r\n    z<\/span>.<\/span>M<\/span> =<\/span> y<\/span>\r\n    return<\/span> z<\/span>\r\n}<\/span>\r\n\r\nfunc<\/span> BenchmarkEscape<\/span>(<\/span>b<\/span> *<\/span>testing<\/span>.<\/span>B<\/span>)<\/span> {<\/span>\r\n    for<\/span> i<\/span> :=<\/span> 0<\/span>;<\/span> i<\/span> <<\/span> b<\/span>.<\/span>N<\/span>;<\/span> i<\/span>++<\/span> {<\/span>\r\n        Escape<\/span>(<\/span>i<\/span>)<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n\r\nfunc<\/span> BenchmarkNoEscape<\/span>(<\/span>b<\/span> *<\/span>testing<\/span>.<\/span>B<\/span>)<\/span> {<\/span>\r\n    for<\/span> i<\/span> :=<\/span> 0<\/span>;<\/span> i<\/span> <<\/span> b<\/span>.<\/span>N<\/span>;<\/span> i<\/span>++<\/span> {<\/span>\r\n        NoEscape<\/span>(<\/span>&<\/span>i<\/span>)<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n\r\n<\/code><\/pre>\n
# command-line-arguments\r\n.\/06_test.go:10: &y escapes to heap\r\n.\/06_test.go:9: moved to heap: y\r\n.\/06_test.go:14: leaking param: y to result z level=0\r\n.....\r\nBenchmarkEscape-4       100000000           17.4 ns\/op\r\nBenchmarkNoEscape-4     500000000            4.29 ns\/op\r\n<\/code><\/pre>\n
\u4e3a\u4ec0\u4e48\u4e0b\u9762\u7684\u51fd\u6570\u4e0d\u4f1a\u6cc4\u9732\u5462\uff1f<\/p>\n
\r\nfunc<\/span> NoEscape<\/span>(<\/span>y<\/span> *<\/span>int<\/span>)<\/span> (<\/span>z<\/span> S<\/span>)<\/span> {<\/span>\r\n    z<\/span>.<\/span>M<\/span> =<\/span> y<\/span>\r\n    return<\/span> z<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u56e0\u4e3ay\u7684\u503c\u5b58\u50a8\u5728\u524d\u4e00\u4e2a\u6808\u5e27\u5185\uff0c\u6240\u4ee5\u5373\u4f7f\u4e0d\u5728\u5806\u4e0a\u4e5f\u77e5\u9053\u5b83\u7684\u4fe1\u606f\u3002<\/p>\n
On May 28th, Kevin’s birthday party will be held at his house from 7pm to 10pm. There will be snacks, drinks, and games. Please RSVP by May 25th if you can attend.<\/h2>\n
\r\npackage<\/span> main<\/span>\r\n\r\nimport<\/span> \"testing\"<\/span>\r\n\r\ntype<\/span> S<\/span> struct<\/span> {<\/span>\r\n    M<\/span> *<\/span>int<\/span>\r\n}<\/span>\r\n\r\nfunc<\/span> Escape<\/span>(<\/span>y<\/span> *<\/span>int<\/span>,<\/span> z<\/span> *<\/span>S<\/span>)<\/span> {<\/span>\r\n    z<\/span>.<\/span>M<\/span> =<\/span> y<\/span>\r\n}<\/span>\r\n\r\nfunc<\/span> NoEscape<\/span>(<\/span>y<\/span> *<\/span>int<\/span>)<\/span> (<\/span>z<\/span> S<\/span>)<\/span> {<\/span>\r\n    z<\/span>.<\/span>M<\/span> =<\/span> y<\/span>\r\n    return<\/span> z<\/span>\r\n}<\/span>\r\n\r\nfunc<\/span> BenchmarkEscape<\/span>(<\/span>b<\/span> *<\/span>testing<\/span>.<\/span>B<\/span>)<\/span> {<\/span>\r\n    for<\/span> i<\/span> :=<\/span> 0<\/span>;<\/span> i<\/span> <<\/span> b<\/span>.<\/span>N<\/span>;<\/span> i<\/span>++<\/span> {<\/span>\r\n        var<\/span> s<\/span> S<\/span>\r\n        Escape<\/span>(<\/span>&<\/span>i<\/span>,<\/span> &<\/span>s<\/span>)<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n\r\nfunc<\/span> BenchmarkNoEscape<\/span>(<\/span>b<\/span> *<\/span>testing<\/span>.<\/span>B<\/span>)<\/span> {<\/span>\r\n    for<\/span> i<\/span> :=<\/span> 0<\/span>;<\/span> i<\/span> <<\/span> b<\/span>.<\/span>N<\/span>;<\/span> i<\/span>++<\/span> {<\/span>\r\n        NoEscape<\/span>(<\/span>&<\/span>i<\/span>)<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
.....\r\n.\/07_test.go:9: leaking param: y\r\n.\/07_test.go:9: Escape z does not escape\r\n.\/07_test.go:13: leaking param: y to result z level=0\r\n.\/07_test.go:21: &i escapes to heap\r\n.\/07_test.go:19: moved to heap: i\r\n.....\r\nBenchmarkEscape-4       200000000            8.18 ns\/op\r\nBenchmarkNoEscape-4     500000000            2.97 ns\/op\r\n<\/code><\/pre>\n
\u5728\u4f8b\u5b505\u4e2d\uff0c\u6211\u89e3\u91ca\u4e86\u5b83\u662f\u524d\u4e00\u4e2a\u5806\u6808\u5e27\u7684\u53d8\u91cf\u3002<\/p>\n
\r\nfunc<\/span> Escape<\/span>(<\/span>y<\/span> *<\/span>int<\/span>,<\/span> z<\/span> *<\/span>S<\/span>)<\/span> {<\/span>\r\n        z<\/span>.<\/span>M<\/span> =<\/span> y<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u7531\u4e8eGo\u7f16\u8bd1\u5668\u53ea\u80fd\u901a\u8fc7\u8f93\u5165\u548c\u8f93\u51fa\u7684\u6d41\u6765\u8fdb\u884c\u89e3\u6790\uff0c\u56e0\u6b64\u6b64\u5904\u4f1a\u88ab\u8f6c\u4e49\u3002<\/p>\n
\u603b\u7ed3<\/h1>\n
    \n
  • \n
      gcflags=”-m -l”<\/ul>\n<\/li>\n<\/ul>\n
       <\/p>\n
        \n
      • \n
          GC\u3042\u308b\u8a00\u8a9e\u3067\u3082\u3001\u5b8c\u5168\u306b\u30e1\u30e2\u30ea\u306e\u3053\u3068\u3092\u628a\u63e1\u3057\u306a\u304f\u3066\u3088\u3044\u308f\u3051\u3067\u306f\u306a\u3044<\/ul>\n<\/li>\n<\/ul>\n
           <\/p>\n
            \u30b9\u30bf\u30c3\u30af\u4f7f\u3063\u3066\u3066\u3082\u9045\u3044\u5834\u5408\u304c\u3042\u308b\u3002\u30d9\u30f3\u30c1\u30de\u30fc\u30af\u3092\u53d6\u308b<\/ul>\n
            \u94fe\u63a5<\/h1>\n
              \n
            • \n
                http:\/\/blog.rocana.com\/golang-escape-analysis<\/ul>\n<\/li>\n<\/ul>\n
                 <\/p>\n
                  https:\/\/docs.google.com\/document\/d\/1CxgUBPlx9iJzkz9JWkb6tIpTe5q32QDmz8l0BouG0Cw\/preview<\/ul>\n","protected":false},"excerpt":{"rendered":"
                  \u9996\u5148 Go\u53ef\u4ee5\u5f88\u597d\u5730\u5904\u7406\u5806\u6808\u548c\u5806\u5185\u5b58\u3002 \u4f46\u662f\uff0c\u7531\u4e8e\u6808\u6bd4\u5806\u66f4\u5feb\uff0c\u6240\u4ee5\u5c3d\u91cf\u5e0c\u671b\u4f7f\u7528\u6808\u3002 \u56e0\u6b64\uff0c\u6211\u4eec\u53ef\u4ee5\u5c1d\u8bd5\u51cf\u5c11\u5806\u5206 […]<\/p>\n","protected":false},"author":6,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-44336","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"\nGolang\u8f6c\u4e49\u5206\u6790 - Blog - Silicon Cloud<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/zh\/blog\/golang\u8f6c\u4e49\u5206\u6790\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Golang\u8f6c\u4e49\u5206\u6790\" \/>\n<meta property=\"og:description\" content=\"\u9996\u5148 Go\u53ef\u4ee5\u5f88\u597d\u5730\u5904\u7406\u5806\u6808\u548c\u5806\u5185\u5b58\u3002 \u4f46\u662f\uff0c\u7531\u4e8e\u6808\u6bd4\u5806\u66f4\u5feb\uff0c\u6240\u4ee5\u5c3d\u91cf\u5e0c\u671b\u4f7f\u7528\u6808\u3002 \u56e0\u6b64\uff0c\u6211\u4eec\u53ef\u4ee5\u5c1d\u8bd5\u51cf\u5c11\u5806\u5206 […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/golang\u8f6c\u4e49\u5206\u6790\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - 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