sparkle is used at run time in 6 crates (of which 2 optionally). It is a direct run-time dependency in 5 crates.

Depender (with downloads and own rev deps) sparkle version
2.1K surfman-chains ^0.1
1 rust-webvr-api ^0.1
offscreen_gl_context ^0.1.3
190 rust-webvr optional ^0.1
120 3 surfman optional ^0.1