| commit | 59ae316f278650f74a9b45d965a10b7fd34f9b39 | |
| author | Edwin Smith <smith@fb.com> | |
| Mon, 23 Mar 2015 15:47:48 +0000 (23 08:47 -0700) | ||
| committer | hhvm-bot <hhvm-bot@fb.com> | |
| Mon, 23 Mar 2015 16:00:33 +0000 (23 09:00 -0700) | ||
| tree | 0c38ea3b486cc42d98bf208823a131278ed25645 | treesnapshot (tar.gz zip) |
| parent | cc32e93cf1fcc4b7a4352f24b39215bdd1068108 | commitdiff |
Pack RefData::m_cow and m_z into a one byte bitfield.
Summary: Taking care to assign to all bitfield members at once, and sizing them
to use a whole byte, enables gcc/clang to optimize mutations into byte
sized memory ops. This also makes room for an extra header byte for
memory-manager use (for GC, later).
Reviewed By: @​bnell
Differential Revision: D1930578
Summary: Taking care to assign to all bitfield members at once, and sizing them
to use a whole byte, enables gcc/clang to optimize mutations into byte
sized memory ops. This also makes room for an extra header byte for
memory-manager use (for GC, later).
Reviewed By: @​bnell
Differential Revision: D1930578
| hphp/runtime/base/ref-data.h | diffblobblamehistory |