>> As of Rust 1.62, compilation time is no longer a valid criticism. Things have improved so much in the past 2-3 versions, it's no longer slower than C++. Sorry!

Is there a report or study somewhere that shows how much it has improved?

I had heard improving compilation and build time was being worked on, but I don't get to use Rust much in my current work.

I would be interested to see how much improvement has been made and in what areas.

See https://perf.rust-lang.org/compare.html?start=2021-11-11&end...

There are a few things to make things slow still. Try macros generating async code. That can go out of control and is a common case in tests.