env_filter is used at run time in 899 crates (of which 67 optionally). It is a direct run-time dependency in 3 crates. It's used at build time in 16 crates (of which 1 optionally, ). It's used only as a dev dependency in 438 crates.

Depender (with downloads and own rev deps) env_filter version
5.6M 7046 env_logger ^0.1.0
hilog ^0.1.0
hitdns ^0.1.0