Phil Hansch

This is my first time tracing down a performance issue but it looks like the majority of the slowdown is caused by the [`difference.rs`](https://github.com/johannhof/difference.rs) crate and not by `rust-pretty-assertions`: ...

As a workaround, you can also add ```toml [profile.dev] opt-level = 2 ``` to your `Cargo.toml`

We are also running into this now as we're upgrading to the latest Android/Gradle version

I'm working on integrating a similar build script into clippy right now, once that's done I'm happy to attempt the same here :+1:

Oh, I didn't end up doing it in the end and Clippy is available on stable now. I think using the `build.rs` from sentry should work out of the box:...

Seems to have been indirectly caused by the stabilization of `std::iter::Iterator::flatten` (https://github.com/rust-lang/rust/pull/51511) and by using an outdated version of `ethcore` in this repo. It has already been fixed in `parity-ethereum`...

I'm really interested in this, too. > Also if Cargo/rustc ever support lint configurations, this would be more future proof: > `cyclomatic_complexity = { state = "allow", threshold = 30...

This Rollup PR from rust demonstrates how rust itself could benefit from a shared lint config, too: https://github.com/rust-lang/rust/pull/52268 (note all the 'deny bare trait object' PRs; and there's a few...

@detrumi I didn't start any work on this, and won't have that much time either. From my side, feel free to start :+1:

I'm going to work on adding the `bless` subcommand to `clippy_dev` this week.