GCD is used at run time in 200 crates (of which 29 optionally). It is a direct run-time dependency in 21 crates. It's used only as a dev dependency in 41 crates (of which 1 directly).

Depender (with downloads and own rev deps) GCD version
50K 92 fugit >=2.1, <3.0
2.2K 1 htb ^2.1.0
550 1 rustscan ^2.0.1
380 4 ckb-std ^2.3.0
350 1 uu_dd ^2.3
110 1 klavier-core ^2.1.0
110 hesp-manifest ^2.3
floating_bar ^2.0.1
quaru ^2.3.0
4 const-frac ^2
1 timestamp-stretcher ^2.0.1
miter ^2.0.1
miratope ^2.0
qalqulator ^2.1.0
3 relp-num ^2.3.0
1 monument ^2.3.0
prime_bag ^2.3.0
1 audio-engine ^2
numerous ^2.3.0
repetend_len ^2.3.0
ucsi ^2.3.0
2.2K 2 stable-hash dev ^2.1.0