[all-commits] [llvm/llvm-project] 2096f3: [libc++][NFC] Use __constexpr_memmove instead of c...

[Nikolas Klauser via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 2096f37d7a580a4b4ddce2a44abb80ff90f273ee
      https://github.com/llvm/llvm-project/commit/2096f37d7a580a4b4ddce2a44abb80ff90f273ee
  Author: Nikolas Klauser <nikolasklauser at berlin.de>
  Date:   2024-03-21 (Thu, 21 Mar 2024)

  Changed paths:
    M libcxx/include/__string/char_traits.h

  Log Message:
  -----------
  [libc++][NFC] Use __constexpr_memmove instead of copy_n in <__string/char_traits.h> (#85920)

`copy_n` has been used to allow constant evaluation of `char_traits`. We
now have `__constexpr_memmove`, which `copy_n` just forwards to. We can
call `__constexpr_memmove` directly, avoiding a bunch of instantiations.
This reduces the time it takes to include `<string>` from 321ms to
285ms.



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