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> I'm curious why [Abseil's] mutex implementation is absent from the author's benchmarks. Possibly because it's C++ (as opposed to C)? I am speculating.

• vitus 2y ago
  > Possibly because it's C++ (as opposed to C)? MSVC 2022's std::mutex is listed, though. (That said, GCC's / clang's std::mutex is not listed for Linux or macOS.) absl::Mutex does come with some microbenchmarks with a handful of points of comparison (std::mutex, absl::base_internal::SpinLock) which might be useful to get an approximate baseline. https://github.com/abseil/abseil-cpp/blob/master/absl/synchronization/mutex_benchmark.cc https://github.com/abseil/abseil-cpp/blob/master/absl/synchr...
  • kccqzy 2y ago
    std::mutex is rarely used. In libc++ for example it was just pthread_mutex_t. So it's not different from just benchmarking pthread. I was talking about the wait() and notify_one() member functions for std::atomic. See https://en.cppreference.com/w/cpp/atomic/atomic/wait https://en.cppreference.com/w/cpp/atomic/atomic/wait and https://en.cppreference.com/w/cpp/atomic/atomic/notify_one https://en.cppreference.com/w/cpp/atomic/atomic/notify_one