My mistake, I was thinking of the wider ecosystem not the runtime, ie formatters, bundles and linters like Biome, oxc, etc being written in Rust or other compil

My mistake, I was thinking of the wider ecosystem not the runtime, ie formatters, bundles and linters like Biome, oxc, etc being written in Rust or other compiled languages. That's where I saw the biggest speedup, because developers of them decided to use a compiled language to write them in instead of JS via a JS runtime where you'll inherently be limited by even a JIT language.