IEEE754 is used at run time in 238 crates (of which 12 optionally). It is a direct run-time dependency in 13 crates. It's used only as a dev dependency in 28 crates (of which 3 directly).

Depender (with downloads and own rev deps) IEEE754 version
76K 14 fast-math ^0.2.6
8.3K 5 accurate ^0.2
5.7K 65 rust-htslib ^0.2
3.0K 6 rmodbus ^0.2.6
160 6 ramp ^0.2
d4tools ^0.2.6
1 smartnoise_validator ^0.2.6
1 framp ^0.2
smartnoise_runtime ^0.2.6
whitenoise_runtime ^0.2.6
sps30 ^0.2
extended-htslib ^0.2
num-shaman ^0.2
2.3M 87 hdrhistogram dev ^0.2.2
28K 4 almost dev ^0.2.6
2 hdrsample dev ^0.2.2