libnghttp2-sys is used at run time in 180 crates (of which 54 optionally). It is a direct run-time dependency in 2 crates. It's used at build time in 8 crates (of which 3 optionally, ). It's used only as a dev dependency in 7 crates.

Depender (with downloads and own rev deps) libnghttp2-sys version
786K 21 curl-sys optional ^0.1.3
2 ratcurl-sys optional ^0.1.3