solana-bn254 is used at run time in 152 crates (of which 3 optionally). It is a direct run-time dependency in 2 crates. It's used only as a dev dependency in 16 crates.

Depender (with downloads and own rev deps) solana-bn254 version
1.4M 608 solana-sdk =2.1.0
27K 19 solana-bpf-loader-program =2.1.0