[libcxx-commits] [libcxx] [libc++] Optimize vector::emplace_back slow path (PR #222016)

[Louis Dionne via libcxx-commits]

https://github.com/ldionne commented:

Can you motivate this change a bit more? What's the magnitude of the improvement? Also, let's run the benchmark CI.

https://github.com/llvm/llvm-project/pull/222016