[Bug libstdc++/46447] std::atomic_flag slower than std::atomic_uchar

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=46447

--- Comment #6 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Jonathan Wakely <redi@gcc.gnu.org>:

https://gcc.gnu.org/g:3cee0c6562e5d8df69a9d6ad613a6f3edcfcc797

commit r11-6138-g3cee0c6562e5d8df69a9d6ad613a6f3edcfcc797
Author: Jonathan Wakely <jwakely@redhat.com>
Date:   Wed Dec 16 11:51:42 2020 +0000

    libstdc++: Add performance test for atomic_flag [PR 46447]

    This adds a test to compare the performance of std::atomic_flag with
    similar operations on std::atomic_uchar and std::atomic_int.

    libstdc++-v3/ChangeLog:

            PR libstdc++/46447
            * testsuite/performance/29_atomics/atomic_flag.cc: New test.