Thus far, I've written two libraries that utilize Rust, and they are usually associated with "high performance". I was able to exceed the performance of similar libraries written in C/C++.
To be perfectly clear, this doesn't mean Rust can replace C/C++ in every scenario, but the actual perf gap is narrower than some folks may be willing to admit.
[0] https://shnatsel.medium.com/how-to-avoid-bounds-checks-in-ru...