[libcxx-commits] [libcxx] [libc++] Tiny optimizations for is_permutation (PR #129565)

[Louis Dionne via libcxx-commits]

ldionne wrote:

What platform are you running your benchmarks on? I also just discovered that we were not enabling vectorization in `mismatch` on AppleClang due to a subtle mistake, so that could add to the noise here.

https://github.com/llvm/llvm-project/pull/129565