fast-float2 is used at run time in 172 crates (of which 37 optionally). It is a direct run-time dependency in 15 crates. It's used only as a dev dependency in 15 crates.

Depender (with downloads and own rev deps) fast-float2 version
150K 73 calamine ^0.2
416K 46 polars-arrow optional ^0.2.2
413K 23 polars-io optional ^0.2.2
57K 18 boa_engine ^0.2.3
56K 2 boa_parser ^0.2.3
51K 3 boa_string ^0.2.3
91K 10 polars-compute optional ^0.2.2
5.0K 4 jsonb ^0.2.3
2.4K 2 qsv-dateparser ^0.2
1.4K 2 graph_builder ^0.2.3
600 phpserz ^0.2.3
500 qsv ^0.2
330 3 databend-common-ast ^0.2.3
270 liberty-db ^0.2
netlist-db ^0.2.3