[all-commits] [llvm/llvm-project] edc3dc: [libc++] Optimize ranges::copy_backward for vector...

[Peng Liu via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: edc3dc6abd9dec70f03107d1477a2baffe7208f7
      https://github.com/llvm/llvm-project/commit/edc3dc6abd9dec70f03107d1477a2baffe7208f7
  Author: Peng Liu <winner245 at hotmail.com>
  Date:   2025-01-30 (Thu, 30 Jan 2025)

  Changed paths:
    M libcxx/docs/ReleaseNotes/21.rst
    M libcxx/include/__algorithm/copy_backward.h
    M libcxx/include/__bit_reference
    M libcxx/include/__vector/vector_bool.h
    M libcxx/include/bitset
    A libcxx/test/benchmarks/algorithms/copy_backward.bench.cpp
    M libcxx/test/std/algorithms/alg.modifying.operations/alg.copy/copy_backward.pass.cpp
    M libcxx/test/std/algorithms/alg.modifying.operations/alg.copy/ranges.copy_backward.pass.cpp

  Log Message:
  -----------
  [libc++] Optimize ranges::copy_backward for vector<bool>::iterator (#121026)

As a follow-up to #121013 (which focused on `std::ranges::copy`), this
PR optimizes the performance of `std::ranges::copy_backward` for
`vector<bool>::iterator`, addressing a subtask outlined in issue #64038.
The optimizations yield performance improvements of up to 2000x for
aligned copies and 60x for unaligned copies.



To unsubscribe from these emails, change your notification settings at https://github.com/llvm/llvm-project/settings/notifications