kjcamann added a comment. I have recently benchmarked this (platform was RHEL 7 and Haswell), and the libc++ version has about twice the latency of a pthread_rwlock for both classes of locking. libc++ is also about twice the latency of the libstdc++ implementation, because it is just a lightweight wrapper around pthread_rwlocks.
https://reviews.llvm.org/D10480 _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org http://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
