All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=737623

Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?keys=agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg7se2uwoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg7sSXsgoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDgrrOdrwsM


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

android-webview-nexus5X

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8975524707192208880

=== Auto-CCing suspected CL author wangxianzhu@chromium.org ===

Hi wangxianzhu@chromium.org, the bisect results pointed to your CL, please take a look at the
results.


=== BISECT JOB RESULTS ===
Perf regression found with culprit

Suspected Commit
  Author : Xianzhu Wang
  Commit : 2381016a46e881351c34f7b7c2e6692565222132
  Date   : Tue Jun 27 18:43:07 2017
  Subject: Add WritingModeUtils.h to convert logical/physical directions

Bisect Details
  Configuration: android_webview_arm64_aosp_perf_bisect
  Benchmark    : blink_perf.layout
  Metric       : large-table-with-collapsed-borders-and-colspans-wider-than-table/large-table-with-collapsed-borders-and-colspans-wider-than-table
  Change       : 7.86% | 1502.52283333 -> 1620.62883333

Revision             Result                  N
chromium@482682      1502.52 +- 15.3897      6      good
chromium@482683      2664.01 +- 1757.2       6      bad       <--
chromium@482684      1654.77 +- 16.5105      6      bad
chromium@482685      1651.08 +- 19.5339      6      bad
chromium@482687      1627.36 +- 18.9641      6      bad
chromium@482692      1621.17 +- 15.3221      6      bad
chromium@482702      1623.46 +- 25.9069      6      bad
chromium@482721      1630.71 +- 13.397       6      bad
chromium@482759      1620.63 +- 15.8416      6      bad

To Run This Test
  src/tools/perf/run_benchmark -v --browser=android-webview --output-format=chartjson --upload-results --pageset-repeat=1 --also-run-disabled-tests blink_perf.layout

Debug Info
  https://chromeperf.appspot.com/buildbucket_job_status/8975524707192208880

Is this bisect wrong?
  https://chromeperf.appspot.com/bad_bisect?try_job_id=5100516964564992


| O O | Visit http://www.chromium.org/developers/speed-infra/perf-bug-faq
|  X  | for more information addressing perf regression bugs. For feedback,
| / \ | file a bug with component Speed>Bisection.  Thank you!

https://chromium-review.googlesource.com/c/558193/

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/013be9bae99c12145f811bdb512cdd624426ac5b

commit 013be9bae99c12145f811bdb512cdd624426ac5b
Author: Xianzhu Wang <wangxianzhu@chromium.org>
Date: Fri Jun 30 22:18:01 2017

Improve performance of LayoutTableCell::CollapsedBorderXXXHalfXXX()

Refactored code to allow the compiler to eliminate unused parameter
evaluations for LogicalToPhysical template.

BUG= 737623 

Change-Id: Iafa1e40ee762041671cf9c430b98c95217d2eb49
Reviewed-on: https://chromium-review.googlesource.com/558193
Reviewed-by: David Grogan <dgrogan@chromium.org>
Reviewed-by: Chris Harrelson <chrishtr@chromium.org>
Commit-Queue: Xianzhu Wang <wangxianzhu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#483842}
[modify] https://crrev.com/013be9bae99c12145f811bdb512cdd624426ac5b/third_party/WebKit/Source/core/layout/LayoutTableCell.cpp
[modify] https://crrev.com/013be9bae99c12145f811bdb512cdd624426ac5b/third_party/WebKit/Source/core/layout/LayoutTableCell.h
[modify] https://crrev.com/013be9bae99c12145f811bdb512cdd624426ac5b/third_party/WebKit/Source/core/layout/LayoutTableCellTest.cpp

 Issue 739300  has been merged into this issue.

 Issue 739301  has been merged into this issue.