"rust""systems-programming""performance"
7 min readRust Rayon: I Added One Letter to My Iterator and Got 8x Faster 🦀⚡
I was processing a 10-second buffer of raw IQ samples from my RTL-SDR in Rust. It worked fine. Then I changed `.iter()` to `.par_iter()` and suddenly all eight CPU cores lit up like a Christmas tree. That's Rayon — the library that makes parallelism embarrassingly easy.
Mar 14, 2026