hyperfine

These results are best taken with a hefty grain of salt; it's really hard to
tell what sort of caching is going on here. There are probably mutliple layers
of disk caching happening. Maybe the multithreading only helps when reading
files from a cache?

https://github.com/ChrisPenner/wc#using-our-cores

have you tested with hyperfine?

https://github.com/sharkdp/hyperfine

it can deal with warmups