IEEE754 is used at run time in 228 crates (of which 13 optionally). It is a direct run-time dependency in 14 crates. It's used only as a dev dependency in 26 crates (of which 3 directly).

Depender (with downloads and own rev deps) IEEE754 version
187K 15 robust optional ^0.2
60K 14 fast-math ^0.2.6
5.0K 4 accurate ^0.2
3.8K 57 rust-htslib ^0.2
1.6K 6 rmodbus ^0.2.6
160 1 fidget ^0.2
100 6 ramp ^0.2
1 framp ^0.2
d4tools ^0.2.6
num-shaman ^0.2
whitenoise_runtime ^0.2.6
1 smartnoise_validator ^0.2.6
smartnoise_runtime ^0.2.6
sps30 ^0.2
1.1M 81 hdrhistogram dev ^0.2.2
20K 4 almost dev ^0.2.6
2 hdrsample dev ^0.2.2