It's a low level language without a GC and compiles to LLVM, it should in theory rival C/C++ in performance, but it's still young and only recently begun making headways for performance.
So just a hunch, also some barely usable benchmarks that appeared on HW a few months back.
> only recently begun making headways for performance
What gave you this impression? MIR landing?
I'm not saying it is a wrong impression, but it doesn't match mine. My impression is that Rust is routinely very fast, often rivals C, and most of the recent headways were surrounding the performance of the compiler, not the resulting programs.
So just a hunch, also some barely usable benchmarks that appeared on HW a few months back.