is_debug is used at run time in 61 crates (of which 6 optionally). It is a direct run-time dependency in 2 crates. It's used at build time in 2 crates (). It's used only as a dev dependency in 15 crates.

Depender (with downloads and own rev deps) is_debug version
95K 33 shadow-rs ^1.0.1
1.3K 17 simple-log ^1.0.1