All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=724985

Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?keys=agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg2tfmtQoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg2vXlqAoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg2q3b_AoM


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

android-nexus5X
android-webview-nexus5X

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8978890257536222592

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

Hi ulan@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 : ulan
  Commit : 6b5e4439724c08ddc5537956be5b46df3ebd327c
  Date   : Thu May 18 19:24:22 2017
  Subject: [heap] Fix verification of unsafe object layout changes.

Bisect Details
  Configuration: android_webview_arm64_aosp_perf_bisect
  Benchmark    : v8.runtimestats.browsing_mobile
  Metric       : v8-gc-incremental-step_max/browse_tools/browse_tools_maps
  Change       : 32.87% | 5.88242857143 -> 7.81577777778

Revision                           Result                  N
chromium@472944                    5.88243 +- 4.89642      14      good
chromium@473018                    5.85744 +- 3.22198      9       good
chromium@473037                    5.54683 +- 1.41481      6       good
chromium@473046                    5.60467 +- 1.24254      6       good
chromium@473051                    5.89989 +- 1.99375      9       good
chromium@473053                    5.39783 +- 1.62668      6       good
chromium@473053,v8@f4da43618c      5.65622 +- 1.88655      9       good
chromium@473053,v8@6b5e443972      8.52033 +- 1.3784       6       bad       <--
chromium@473053,v8@9397c1b73a      7.94456 +- 3.17093      9       bad
chromium@473054                    8.8875 +- 0.929865      6       bad
chromium@473055                    7.91614 +- 4.39879      14      bad
chromium@473091                    8.54444 +- 2.45728      9       bad
chromium@473238                    7.81578 +- 3.60397      9       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 --story-filter=browse.tools.maps v8.runtimestats.browsing_mobile

Debug Info
  https://chromeperf.appspot.com/buildbucket_job_status/8978890257536222592

Is this bisect wrong?
  https://chromeperf.appspot.com/bad_bisect?try_job_id=5325627231567872


| 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!

There are no graphs for this bug.

The "Original alerts at time of bug-filing" shows that all alerts are linked to Issue 725409

I will continue investigation there.