PR: https://github.com/rust-lang/rust/pull/92294 Perf results: https://perf.rust-lang.org/compare.html?start=4d2e0fd96ccbb9ade41f1a3f07b14b7437f8e4ef&end=c9cf9c65072a35585f9521ab95044f32d5fcb9ec  Maybe I'm missing something: Why isn't this flagged as "Improvement" ?