All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=818696

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=21e06ad5383a18d60f54a6d8fb7bb3e582d1cdfc4c593d8912f915edade9a8a7


Bot(s) for this bug's original alert(s):

chromium-rel-win8-dual
linux-release

📍 Pinpoint job started.
https://pinpoint-dot-chromeperf.appspot.com/job/1195815c440000

📍 Found significant differences after each of 4 commits.
https://pinpoint-dot-chromeperf.appspot.com/job/1195815c440000

Oilpan: Emit write barrier on collection backing assignment by keishi@chromium.org
https://chromium.googlesource.com/chromium/src/+/d0e0bb6ae37606fdb8b19bab4714706af7580088

Add traffic annotation to required arguments to SpdyStream. by rhalavati@chromium.org
https://chromium.googlesource.com/chromium/src/+/ead4271f098dd2038ec8514f1bf9b59f83b0774b

[css-tables] Test that tables have box-sizing:border-box by default by dgrogan@chromium.org
https://chromium.googlesource.com/chromium/src/+/88182a1b277a19642a857836461cbf4fa7d64dd8

Do not suppress pointercancel event when dnd by eirage@chromium.org
https://chromium.googlesource.com/chromium/src/+/34552fa720bd55ae7b87cdb4897477a8a4893e79

Understanding performance regressions:
  http://g.co/ChromePerformanceRegressions

not related to my change :)

It's certainly not dgrogan's change, since that CL just adds tests.

Sorry this is probably me.

And sure not me.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/3b7d320daba402c17ead0e5d69eceaf1dcc7c286

commit 3b7d320daba402c17ead0e5d69eceaf1dcc7c286
Author: Keishi Hattori <keishi@chromium.org>
Date: Thu Mar 08 06:13:32 2018

Oilpan: Hide collection backing write barrier behind the incremental marking flag

Adding the write barrier to collection backings regressed blink_perf.parser by 16%

Bug:  818696 
Change-Id: If964e2ccf39beb3010063bf785e97c60ddf007c2
Reviewed-on: https://chromium-review.googlesource.com/953443
Reviewed-by: Kentaro Hara <haraken@chromium.org>
Commit-Queue: Keishi Hattori <keishi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#541733}
[modify] https://crrev.com/3b7d320daba402c17ead0e5d69eceaf1dcc7c286/third_party/WebKit/Source/platform/heap/HeapAllocator.h

 Issue 818671  has been merged into this issue.

Performance seems to have recovered.
https://chromeperf.appspot.com/group_report?bug_id=818696