Compile times are slower on 1.56

[davidpdrsn]

Rust 1.56 has had a regression in compile times that impacts axum. Some users have reported significantly worse compile times on 1.56.

I think the solution will be #393 but have to do some more testing before we can ship a release.

I will also open an issue for rustc (unless someone already has)

[paolobarbolini]

I already reported it rust-lang/rust#89601 and was basically marked as duplicate, as there already is rust-lang/rust#89195

[davidpdrsn]

This bug is fixed in #404 and will be shipped in 0.3