IEEE754 is used at run time in 226 crates (of which 13 optionally). It is a direct run-time dependency in 14 crates. It's used only as a dev dependency in 24 crates (of which 3 directly).

Depender (with downloads and own rev deps) IEEE754 version
286K 15 robust optional ^0.2
93K 14 fast-math ^0.2.6
7.1K 55 rust-htslib ^0.2
7.0K 4 accurate ^0.2
1.8K 6 rmodbus ^0.2.6
230 6 ramp ^0.2
1 fidget ^0.2
whitenoise_runtime ^0.2.6
d4tools ^0.2.6
num-shaman ^0.2
sps30 ^0.2
1 framp ^0.2
1 smartnoise_validator ^0.2.6
smartnoise_runtime ^0.2.6
1.5M 79 hdrhistogram dev ^0.2.2
10K 4 almost dev ^0.2.6
2 hdrsample dev ^0.2.2