GIL（Global Interpreter Lock）是CPython解释器中的一个互斥锁（mutex）机制，其核心作用是保护Python对象的访问，防止多个本地线程同时执行Python字节码。从技术实现角度来看，GIL确保在任一时刻只有一个线程能在Python解释器中执行代码。

在性能要求较高的应用场景中，Python常因其执行速度不及C、C++或Rust等编译型语言而受到质疑。然而通过合理运用Python标准库提供的优化特性，我们可以显著提升Python代码的执行效率。本文将详细介绍几种实用的性能优化技术。

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