All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=763771

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=456b2bd7340ed8fa3bd5aafd162c7fd1e83321f7e0111d3b26a1525747753c3e


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

chromium-rel-mac-retina
chromium-rel-mac11
chromium-rel-win10
chromium-rel-win7-dual
chromium-rel-win7-gpu-ati
chromium-rel-win7-gpu-intel
chromium-rel-win7-x64-dual
win-high-dpi

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8968775007549801200

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8968774922391299680

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8968774885887990416

=== BISECT JOB RESULTS ===
NO Perf regression found

Bisect Details
  Configuration: mac_retina_perf_bisect
  Benchmark    : v8.runtimestats.browsing_desktop
  Metric       : JavaScript:duration_avg/browse_social/browse_social_facebook_infinite_scroll

Revision             Result                  N
chromium@499210      2556.16 +- 113.356      21      good
chromium@499342      2551.49 +- 111.786      21      bad

To Run This Test
  src/tools/perf/run_benchmark -v --browser=release --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/8968774885887990416


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: winx64intel_perf_bisect
  Benchmark    : v8.runtimestats.browsing_desktop
  Metric       : Parse-Background:duration_avg/browse_social/browse_social_facebook_infinite_scroll
  Change       : 44.34% | 61.7105 -> 89.076

Revision                           Result                  N
chromium@498827                    61.7105 +- 5.44724      6      good
chromium@499200                    61.617 +- 2.31686       6      good
chromium@499386                    61.3632 +- 4.60307      6      good
chromium@499479                    62.1958 +- 5.98379      6      good
chromium@499526                    62.7217 +- 4.09651      6      good
chromium@499538                    60.5217 +- 1.49989      6      good
chromium@499538,v8@1c1457fa70      62.3245 +- 6.32078      6      good
chromium@499538,v8@36d703778c      87.6673 +- 3.51404      6      bad       <--
chromium@499538,v8@7abdadca0e      89.6753 +- 7.88193      6      bad
chromium@499539                    93.5275 +- 18.8851      6      bad
chromium@499540                    89.5483 +- 4.75094      6      bad
chromium@499541                    92.3083 +- 10.6654      6      bad
chromium@499544                    91.8583 +- 6.09218      6      bad
chromium@499549                    90.091 +- 4.28384       6      bad
chromium@499572                    91.2023 +- 4.24407      6      bad
chromium@500316                    89.076 +- 4.66421       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/8968775007549801200


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: win_x64_perf_bisect
  Benchmark    : v8.runtimestats.browsing_desktop
  Metric       : Parse-Background:duration_avg/browse_social/browse_social_facebook_infinite_scroll
  Change       : 35.71% | 78.2006666667 -> 106.125333333

Revision                           Result                  N
chromium@498840                    78.2007 +- 6.70517      6      good
chromium@499206                    77.0652 +- 3.36711      6      good
chromium@499389                    77.5512 +- 4.68974      6      good
chromium@499481                    78.1832 +- 7.54095      6      good
chromium@499527                    79.3105 +- 5.71841      6      good
chromium@499533                    78.9322 +- 4.4959       6      good
chromium@499536                    77.7088 +- 3.63533      6      good
chromium@499538                    78.6965 +- 2.65442      6      good
chromium@499538,v8@1c1457fa70      78.3502 +- 3.02448      6      good
chromium@499538,v8@36d703778c      109.963 +- 5.33364      6      bad       <--
chromium@499538,v8@7abdadca0e      108.788 +- 7.70891      6      bad
chromium@499539                    108.672 +- 3.40828      6      bad
chromium@499550                    108.364 +- 5.19165      6      bad
chromium@499572                    108.888 +- 2.54815      6      bad
chromium@500303                    106.125 +- 5.39674      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/8968774922391299680


For feedback, file a bug with component Speed>Bisection