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读写锁的性能一定更好吗 | 一根笨茄子
source link: http://blog.guoyb.com/2018/02/11/rwlock/?
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最近在写代码的时候，处理多线程间数据同步时，用到了读写锁rwlock。在多线程同步中，更常用到的是互斥量mutex，那rwlock和mutex有什么不同和优劣呢？ 首先，一个常见的误区是，认为在读多写少的情况下，rwlock的性能一定要比mutex高。实际上，rwlock由于区分读锁和写锁，每次加锁时都要做额外的逻辑处理（如区分读锁和写锁、避免写锁“饥饿”等等），单纯从性能上来讲是要低于更为
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