I can't think of any particular piece that requires Rust specifically for performance, no. The real beauty of Rust is that I was able to achieve this performanc

I can't think of any particular piece that requires Rust specifically for performance, no. The real beauty of Rust is that I was able to achieve this performance in the first place, all with very very little use of unsafe (even in the regex engine itself). But of course, as we all know, performance isn't everything. Even ripgrep itself accepts a performance penalty in its default mode of operation, in order to improve the relevance of results shown.