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| author | Pádraig Brady <pbrady@fb.com> | 2019-05-20 11:15:03 +0000 |
|---|---|---|
| committer | Jonathan Wakely <redi@gcc.gnu.org> | 2019-05-20 12:15:03 +0100 |
| commit | e5178b986a66848440fbb076287c5a0f87d86c6f (patch) | |
| tree | 294d66da4291c695a3645943287540ae1b32fa68 /gcc | |
| parent | eb530cab9a02ab8f223883422f74f4f3a4b24c64 (diff) | |
| download | gcc-e5178b986a66848440fbb076287c5a0f87d86c6f.zip gcc-e5178b986a66848440fbb076287c5a0f87d86c6f.tar.gz gcc-e5178b986a66848440fbb076287c5a0f87d86c6f.tar.bz2 | |
std::allocator::deallocate support sized-deallocation
Pass the size to the allocator so that it may optimize deallocation.
This was seen to significantly reduce the work required in jemalloc,
with about 40% reduction in CPU cycles in the free path.
Note jemalloc >= 5.2 is required to fix a crash with 0 sizes.
2019-05-20 Pádraig Brady <pbrady@fb.com>
* libstdc++-v3/include/ext/new_allocator.h (deallocate): Pass the size
to the deallocator with -fsized-deallocation.
From-SVN: r271409
Diffstat (limited to 'gcc')
0 files changed, 0 insertions, 0 deletions