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I count 14: https://github.com/hyperium/hyper/blob/master/Cargo.toml#L22...

bytes, futures-core, futures-channel, futures-util, http, http-body, httpdate, httparse, h2, itoa, tracingfeatures, pin-project, tower-service, tokio, want

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Those are the direct dependencies. They have dependencies of their own. What counts is the entire DAG traversal including all transitive dependencies.

I count 67 --> 42 (after removing the dev only deps)

https://gist.github.com/seg-lol/0d22cf5002f890305cfd094f9ed1...

*edit, passed in -e no-dev to `cargo tree`, thanks @est31 for the suggestion

The number is smaller than that. You need to pass -e no-dev to cargo tree to filter out the dev-dependencies (which are only relevant for hyper development).

Thanks!

Here is my script:

https://github.com/nu8/cove/tree/master/rust-deps

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