IEEE754 is used at run time in 190 crates (of which 10 optionally). It is a direct run-time dependency in 14 crates. It's used only as a dev dependency in 23 crates (of which 3 directly).

Depender (with downloads and own rev deps) IEEE754 version
106K 14 fast-math ^0.2.6
172K 14 robust optional ^0.2
9.7K 3 accurate ^0.2
3.3K 39 rust-htslib ^0.2
1.0K 5 rmodbus ^0.2.6
390 fidget ^0.2
320 6 ramp ^0.2
1 framp ^0.2
whitenoise_runtime ^0.2.6
d4tools ^0.2.6
num-shaman ^0.2
sps30 ^0.2
1 smartnoise_validator ^0.2.6
smartnoise_runtime ^0.2.6
1.1M 66 hdrhistogram dev ^0.2.2
6.7K 3 almost dev ^0.2.6
2 hdrsample dev ^0.2.2