fastapprox is used at run time in 8 crates (of which 2 optionally). It is a direct run-time dependency in 3 crates. It's used only as a dev dependency in 1 crate.

Depender (with downloads and own rev deps) fastapprox version
knyst ^0.3
2 euphony-dsp ^0.3
400 3 deki_core optional ^0.3.1
wright_omega dev ^0.3.1