[Bug 2030797] Re: Parallel C++ algorithms run sequentially

[Matthias Klose]

** Bug watch added: GCC Bugzilla #110512
   https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110512

** Also affects: gcc via
   https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110512
   Importance: Unknown
       Status: Unknown

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Title:
  Parallel C++ algorithms run sequentially

Status in gcc:
  Unknown
Status in gcc-13 package in Ubuntu:
  New

Bug description:
  Parallel C++ algorithms run sequentially when C++20 iterators are used
  with libstdc++, causing significant performance degradation on
  multicore systems (10-100x) when run on Ubuntu Linux.

  Patch to GCC available here:
  https://gcc.gnu.org/pipermail/libstdc++/2023-July/056266.html

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