[libcxx-commits] [libcxx] [libc++] Optimize basic_string::append(Iter, Iter) (PR #169794)

[Louis Dionne via libcxx-commits]

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ldionne wrote:

Can you please add an explanation of what the optimization is in the commit message? And also please include benchmark results.

https://github.com/llvm/llvm-project/pull/169794