many_cpus is used at run time in 3 crates. It's used only as a dev dependency in 1 crate.

Depender (with downloads and own rev deps) many_cpus version
1.9K region_local ^0.2.4
1.8K region_cached ^0.2.4
1.6K many_cpus_benchmarking ^0.2.4
1.8K 2 linked dev ^0.2.4