Improve build times by generating less IR #1192
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jplatte
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jplatte
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* example
* `MethodRouter::merge`
* `set_content_length` and `set_allow_header`
* `MethodRouter::on_service_boxed_response_body`
* `Router::route`
* `MethodRouter::merge` again
* `MethodRouter::on_service_boxed_response_body`
* `Router::call_route`
* `MethodRouter::{layer, route_layer}`
* revert example
* fix test
* move function to method on `AllowHeader`
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I used
cargo-llvm-linesto find functions that generates lots of IR and tweaked them (mostly by making inner functions) to generate less. The biggest offender wasMethodRouter::merge.I tested on a small example with a couple of routes and some middleware and this shaved ~1 second of the clean debug build time (12 seconds to 11 seconds) and a 3% reduction in IR.