All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=761736

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=61f49aff021a362cb6abbe7616e6a3dc5fb98380834a370e65563f102b111f61


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

android-nexus5X

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8969399436877680608

=== BISECT JOB RESULTS ===
Perf regression found but unable to narrow commit range

Build failures prevented the bisect from narrowing the range further.


Bisect Details
  Configuration: android_nexus5X_perf_bisect
  Benchmark    : v8.browsing_mobile
  Metric       : v8-gc-incremental-step_max/browse_tech/browse_tech_discourse_infinite_scroll
  Change       : 130.49% | 1.94564285714 -> 4.29633333333

Suspected Commit Range
  3 commits in range
  https://chromium.googlesource.com/chromium/src/+log/6122d4c46b0e6c57d77f180083d57fbf78dd2d1a..0ca61beb9b0295961d963450dbea5fc021e7fa18


Revision             Result                   N
chromium@499260      1.94564 +- 0.678154      14       good
chromium@499261      2.01478 +- 0.620559      9        good
chromium@499262      ---                      ---      build failure
chromium@499263      ---                      ---      build failure
chromium@499264      2.22379 +- 0.890178      14       bad
chromium@499268      3.14917 +- 1.16167       6        bad
chromium@499276      3.4285 +- 0.689402       6        bad
chromium@499292      3.55033 +- 0.306675      6        bad
chromium@499324      3.55617 +- 0.619213      6        bad
chromium@499388      4.29633 +- 2.5449        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 --story-filter=browse.tech.discourse.infinite.scroll v8.browsing_mobile

More information on addressing performance regressions:
  http://g.co/ChromePerformanceRegressions

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8969399436877680608


For feedback, file a bug with component Speed>Bisection

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8969378192591789696

=== BISECT JOB RESULTS ===
Perf regression found but unable to narrow commit range

Build failures prevented the bisect from narrowing the range further.


Bisect Details
  Configuration: android_nexus5X_perf_bisect
  Benchmark    : v8.browsing_mobile
  Metric       : v8-gc-incremental-step_max/browse_tech/browse_tech_discourse_infinite_scroll
  Change       : 93.86% | 2.46477777778 -> 4.92866666667

Suspected Commit Range
  2 commits in range
  https://chromium.googlesource.com/v8/v8.git/+log/c58460b25f69acb2250d1d34af022de8b6c76bd6..70a516387a159a82f4b7dd6277ad26ee7e022519


Revision                           Result                   N
chromium@499260                    2.46478 +- 0.598356      9        good
chromium@499264                    2.66633 +- 1.4988        9        good
chromium@499265                    2.421 +- 0.974001        9        good
chromium@499265,v8@ece1e2d149      2.33179 +- 1.13489       14       good
chromium@499265,v8@c58460b25f      2.50586 +- 2.15531       14       good
chromium@499265,v8@68eabceb15      ---                      ---      build failure
chromium@499265,v8@70a516387a      3.14429 +- 1.42566       14       bad
chromium@499265,v8@36ef81b6ea      3.00992 +- 1.40777       13       bad
chromium@499265,v8@9619b7f23c      3.25011 +- 2.31825       9        bad
chromium@499265,v8@d138f8d7ef      3.6185 +- 0.870968       6        bad
chromium@499266                    3.493 +- 0.790243        9        bad
chromium@499268                    3.465 +- 0.684446        9        bad
chromium@499276                    3.4575 +- 0.609744       6        bad
chromium@499292                    3.56167 +- 0.991249      6        bad
chromium@499324                    3.39817 +- 0.481638      6        bad
chromium@499388                    4.92867 +- 2.09105       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 --story-filter=browse.tech.discourse.infinite.scroll v8.browsing_mobile

More information on addressing performance regressions:
  http://g.co/ChromePerformanceRegressions

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8969378192591789696


For feedback, file a bug with component Speed>Bisection

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8969306371534132896

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

Hi jgruber@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 : jgruber
  Commit : 70a516387a159a82f4b7dd6277ad26ee7e022519
  Date   : Wed Aug 30 09:46:40 2017
  Subject: Reland "[snapshot] Move builtins to dedicated snapshot area"

Bisect Details
  Configuration: android_nexus5X_perf_bisect
  Benchmark    : v8.browsing_mobile
  Metric       : v8-gc-incremental-step_max/browse_tech/browse_tech_discourse_infinite_scroll
  Change       : 36.63% | 2.46666666667 -> 3.37016666667

Revision                           Result                   N
chromium@499261                    2.46667 +- 1.01218       6       good
chromium@499265                    2.52164 +- 1.53271       14      good
chromium@499265,v8@ece1e2d149      2.48167 +- 0.596742      6       good
chromium@499265,v8@68eabceb15      2.37883 +- 0.589416      6       good
chromium@499265,v8@70a516387a      3.36583 +- 0.866336      6       bad       <--
chromium@499265,v8@36ef81b6ea      3.38683 +- 1.23902       6       bad
chromium@499265,v8@9619b7f23c      3.10889 +- 0.665534      9       bad
chromium@499265,v8@d138f8d7ef      3.00964 +- 1.34484       14      bad
chromium@499266                    3.38178 +- 1.10768       9       bad
chromium@499267                    3.30867 +- 0.668329      6       bad
chromium@499269                    3.24678 +- 0.829386      9       bad
chromium@499276                    3.37017 +- 0.190842      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 --story-filter=browse.tech.discourse.infinite.scroll v8.browsing_mobile

More information on addressing performance regressions:
  http://g.co/ChromePerformanceRegressions

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8969306371534132896


For feedback, file a bug with component Speed>Bisection