bitcoinsecp256k1-ec is used at run time in 90 crates. It is a direct run-time dependency in 7 crates.

Depender (with downloads and own rev deps) bitcoinsecp256k1-ec version
300 11 bitcoin-secp256k1 ^0.1.16-alpha.0
300 5 bitcoinsecp256k1-keys ^0.1.16-alpha.0
1 bitcoin-fuzz ^0.1.16-alpha.0
bitcoinsecp256k1-bench ^0.1.16-alpha.0
bitcoinsecp256k1-parse ^0.1.16-alpha.0
bitcoinsecp256k1-recovery ^0.1.16-alpha.0
bitcoinsecp256k1-schnorr ^0.1.16-alpha.0