Filip Pizlo (Hacker News): Compared to OS-provided locks like pthread_mutex, WTF::Lock is 64 times smaller and up to 180 times faster. Compared to OS-provided condition variables like pthread_cond, WTF::Condition is 64 times smaller. Using WTF::Lock instead of pthread_mutex means that WebKit is 10% faster on JetStream, 5% faster on Speedometer, and 5% faster on our … Continue reading Locking in WebKit