Julia Evansthis is such a good debugging story ("Rust std fs slower than Python!? No, it's hardware!”) https://xuanwo.io/2023/04-rust-std-fs-slower-than-python/
Victor Stinner 🐍@b0rk It's a I/O-bound benchmark! Oh wait, in fact, it's a memcpy() benchmark. Oh wait, in fact it's a REP MOVSB microbenchmark. Oh wait, it's a CPU FSRM (Fast Short REP MOV) microcode micromicrobenchmark! Great write-up.