What is the purpose of std::thread in C++?

std::thread is a class in the C++ standard library used to create and manage threads. It allows programmers to execute code in parallel in a multithreaded environment, thus improving the performance and efficiency of the program. With std::thread, programmers can create new threads and set functions or member functions as the entry points for these threads to achieve concurrent execution. std::thread provides a series of methods to control the lifecycle of threads, such as starting threads, waiting for threads to finish, and checking if threads are running. In multithreaded programming, std::thread is a very important tool that can help programmers achieve concurrent execution and improve program performance.