extprim is used at run time in 38 crates (of which 14 optionally, 7 directly). It's used at build time in 8 crates (of which 3 optionally, 0 directly). It's used only as a dev dependency in 6 crates.

Depender (with downloads and own rev deps) extprim version
21K 39 syntex_syntax ^1.0
550 1 syntex_syntax2 ^1.0
370 2 extprim_literals dev ^1
250 lz_fnv optional ^1.4.0
130 1 extprim_literals_macros ^1
lz_diet optional ^1.7.0
telegram ^1.4.0