All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=700971

Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?keys=agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg1PC-qQoM


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

android-nexus5

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8985217302780849568

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

Hi chrishtr@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 : chrishtr
  Commit : 890521e5189ff65fb2c16f67c837cc09bcf503c9
  Date   : Thu Mar 09 20:22:24 2017
  Subject: Reland: Improve performance of GeometryMapper cache.

Bisect Details
  Configuration: android_nexus5_perf_bisect
  Benchmark    : blink_perf.paint
  Metric       : paint-offset-changes/paint-offset-changes
  Change       : 6.45% | 2176.35083333 -> 2316.76758333

Revision             Result                  N
chromium@455818      2176.35 +- 19.9332      6      good
chromium@455835      2220.55 +- 48.1508      6      good
chromium@455844      2305.7 +- 82.5892       6      good
chromium@455848      2314.99 +- 32.921       6      good
chromium@455849      2296.64 +- 92.4975      6      good
chromium@455850      2386.25 +- 41.994       6      bad       <--
chromium@455852      2397.5 +- 22.6628       6      bad
chromium@455885      2316.77 +- 90.2297      6      bad

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

Debug Info
  https://chromeperf.appspot.com/buildbucket_job_status/8985217302780849568

Is this bisect wrong?
  https://chromeperf.appspot.com/bad_bisect?try_job_id=4932625631805440


| 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!

Original land of my CL was at 455571.

I don't think my patch was the cause of this bug, because the graph shows
no regression associated with 455571, and also no positive change when it was
reverted.

Also, this graph improved quite a bit at revision 453070, presumably due to
https://codereview.chromium.org/2707063003.

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8984928478939718272

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

Suspected Commit
  Author : pdr
  Commit : ce1b788de6382f8c3725efe1fb14e9d4c639b5ab
  Date   : Thu Mar 09 04:36:32 2017
  Subject: Heap allocate PrePaintTreeWalk context object

Bisect Details
  Configuration: android_nexus5_perf_bisect
  Benchmark    : blink_perf.paint
  Metric       : paint-offset-changes/paint-offset-changes
  Change       : 14.11% | 2017.57 -> 2302.15641667

Revision             Result                  N
chromium@455589      2017.57 +- 33.4543      6      good
chromium@455641      2032.84 +- 26.5504      6      good
chromium@455667      2020.55 +- 48.5291      6      good
chromium@455668      2199.12 +- 25.6653      6      bad       <--
chromium@455669      2196.72 +- 21.794       6      bad
chromium@455671      2188.55 +- 24.2253      6      bad
chromium@455675      2184.71 +- 37.4305      6      bad
chromium@455680      2190.33 +- 35.6031      6      bad
chromium@455692      2243.22 +- 56.9988      6      bad
chromium@455795      2215.39 +- 66.9694      6      bad
chromium@456000      2302.16 +- 50.6021      6      bad

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

Debug Info
  https://chromeperf.appspot.com/buildbucket_job_status/8984928478939718272

Is this bisect wrong?
  https://chromeperf.appspot.com/bad_bisect?try_job_id=6355033303547904


| 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!