All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=769693

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=bd95b960d11403ebdb2787317048c729afbe6916e0b32620ef660ac93353cb18


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

android-webview-nexus5X
android-webview-nexus6
chromium-rel-mac11
chromium-rel-win7-gpu-nvidia

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8967205884527670976

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8967205754850577232

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8967205734411687280

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

Suspected Commit
  Author : nednguyen
  Commit : aca6ca9eacf53d6d12f599ba6b9011951fde2017
  Date   : Mon Sep 11 16:56:48 2017
  Subject: Use --ignore-certificate-errors for webview

Bisect Details
  Configuration: android_webview_arm64_aosp_perf_bisect
  Benchmark    : v8.runtimestats.browsing_mobile
  Metric       : Optimize:duration_avg/browse_news/browse_news_cricbuzz

Revision                                 Result                  N
chromium@500984                          0.0 +- 0.0              6      good
chromium@501011                          0.0 +- 0.0              6      good
chromium@501011,catapult@59c0f71abc      0.0 +- 0.0              6      good
chromium@501011,catapult@0ed6f7d08a      0.0 +- 0.0              6      good
chromium@501011,catapult@aca6ca9eac      13.6762 +- 2.30793      6      bad       <--
chromium@501012                          13.3918 +- 4.00646      6      bad
chromium@501013                          14.3298 +- 3.42508      6      bad
chromium@501015                          14.0952 +- 1.21119      6      bad
chromium@501018                          13.7897 +- 3.7508       6      bad
chromium@501024                          15.5723 +- 5.45324      6      bad
chromium@501037                          13.6587 +- 3.58528      6      bad
chromium@501089                          12.153 +- 13.7566       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 --story-filter=browse.news.cricbuzz v8.runtimestats.browsing_mobile

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8967205884527670976


For feedback, file a bug with component Speed>Bisection

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

Suspected Commit
  Author : Sunny Sachanandani
  Commit : 2eb3c8ac7ffc6840dc07f5e8312576e107eece23
  Date   : Wed Sep 06 02:01:21 2017
  Subject: cc: Flush after every tile task set completes.

Bisect Details
  Configuration: winx64nvidia_perf_bisect
  Benchmark    : v8.runtimestats.browsing_desktop
  Metric       : V8 C++:duration_avg/browse_social/browse_social_twitter_infinite_scroll
  Change       : 24.67% | 1085.836 -> 1353.66433333

Revision             Result                  N
chromium@499747      1085.84 +- 38.3556      6      good
chromium@499811      1097.57 +- 87.6778      5      good
chromium@499843      1103.72 +- 94.3635      6      good
chromium@499844      1079.93 +- 59.8265      6      good
chromium@499845      1338.42 +- 45.7342      6      bad       <--
chromium@499847      1355.56 +- 81.4108      6      bad
chromium@499851      1382.98 +- 106.464      6      bad
chromium@499859      1340.97 +- 90.2953      6      bad
chromium@499875      1359.18 +- 51.8715      6      bad
chromium@500002      1352.28 +- 75.6426      6      bad
chromium@500256      1352.8 +- 68.547        6      bad
chromium@500764      1343.13 +- 68.6017      6      bad
chromium@501780      1353.66 +- 132.374      6      bad

To Run This Test
  src/tools/perf/run_benchmark -v --browser=release_x64 --output-format=chartjson --upload-results --pageset-repeat=1 --also-run-disabled-tests --story-filter=browse.social.twitter.infinite.scroll v8.runtimestats.browsing_desktop

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8967205754850577232


For feedback, file a bug with component Speed>Bisection

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

Suspected Commit
  Author : Marja Hölttä
  Commit : 36d703778ccd0d2777e0d4b69ed6e65e39a9f521
  Date   : Mon Sep 04 16:05:39 2017
  Subject: [parser] Tentatively enable FLAG_preparser_scope_analysis.

Bisect Details
  Configuration: winx64nvidia_perf_bisect
  Benchmark    : v8.runtimestats.browsing_desktop
  Metric       : Parse-Background:duration_avg/browse_social/browse_social_facebook_infinite_scroll
  Change       : 69.50% | 63.1528333333 -> 107.045333333

Revision                           Result                  N
chromium@498789                    63.1528 +- 2.34931      6      good
chromium@499537                    64.1203 +- 5.7963       6      good
chromium@499538                    64.074 +- 6.74818       6      good
chromium@499538,v8@1c1457fa70      62.4785 +- 3.56451      6      good
chromium@499538,v8@36d703778c      92.8853 +- 3.86758      6      bad       <--
chromium@499538,v8@7abdadca0e      92.8805 +- 4.71981      6      bad
chromium@499539                    93.5525 +- 1.8938       6      bad
chromium@499540                    93.8267 +- 5.36516      6      bad
chromium@499543                    92.1102 +- 5.04363      6      bad
chromium@499549                    93.3255 +- 4.3954       6      bad
chromium@499561                    91.7367 +- 4.83385      6      bad
chromium@499584                    92.9043 +- 7.66351      6      bad
chromium@499631                    93.522 +- 5.96469       6      bad
chromium@499724                    91.0737 +- 5.19825      6      bad
chromium@499911                    91.3078 +- 6.35872      6      bad
chromium@500285                    91.6447 +- 9.78215      6      bad
chromium@501780                    107.045 +- 19.4228      6      bad

To Run This Test
  src/tools/perf/run_benchmark -v --browser=release_x64 --output-format=chartjson --upload-results --pageset-repeat=1 --also-run-disabled-tests --story-filter=browse.social.facebook.infinite.scroll v8.runtimestats.browsing_desktop

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8967205734411687280


For feedback, file a bug with component Speed>Bisection