I experience really nasty slowdown which seems to be caused by https://github.com/rust-lang/rust/issues/38528 It leads to about 80-100 sec build time using current nightly Rust. Curiously, incremental builds take even longer.
I also see that that bug was down-prioritized and lives already for a year. It seems that it’s no longer in development. Unfortunately, I cannot use boxing to ease that pain.
Any thoughts on this?