tree be52aa5957334664d83b633ee10e850b3c333b90
parent ab8296b48acc3d3165a58b125ff04055300d874c
author mtklein <mtklein@chromium.org> 1444247203 -0700
committer Commit bot <commit-bot@chromium.org> 1444247203 -0700

SkPath::fFirstDirection: seq-cst -> relaxed

We landed this originally with lazily-correct sequentially-consistent memory
order.  It turns out that's regressed performance, we think particularly when
recording paths.  We also think there's no need for anything but relaxed memory
order here.

We should see this chart go down if all goes well: https://perf.skia.org/#4329
There are also Chrome performance charts to watch in the linked bug.

BUG=chromium:537700

CQ_EXTRA_TRYBOTS=client.skia:Test-Ubuntu-GCC-GCE-CPU-AVX2-x86_64-Release-TSAN-Trybot,Test-Ubuntu-GCC-Golo-GPU-GT610-x86_64-Release-TSAN

No public API changes.
TBR=reed@google.com

Review URL: https://codereview.chromium.org/1393833003