zstd normally uses timespec_get() for measuring wall-clock time. But that's available only since C11. For older standards, it uses clock(); but that returns CPU

zstd normally uses timespec_get() for measuring wall-clock time. But that's available only since C11. For older standards, it uses clock(); but that returns CPU time, which is wrong. https://github.com/facebook/zstd/pull/3165 https://github.com/facebook/zstd/pull/3165