All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=770454

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=b07da3fcd92795679f07c4b851710cd001ca04a095ab85ddb3d3825b6e5767f1


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

linux-release

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8967041581429472528

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

Hi marja@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 : Marja Hölttä
  Commit : 40856948a64e2b76bc121a8841a763836dbf1b37
  Date   : Thu Sep 28 12:41:56 2017
  Subject: [parser] Skipping inner funcs: Turn off FLAG_preparser_scope_analysis.

Bisect Details
  Configuration: linux_perf_bisect
  Benchmark    : v8.runtimestats.browsing_desktop
  Metric       : Parse:duration_avg/browse_social/browse_social_twitter
  Change       : 108.27% | 73.2243333333 -> 152.504333333

Revision                           Result                  N
chromium@504971                    73.2243 +- 5.61179      6      good
chromium@505103                    73.1928 +- 3.04647      6      good
chromium@505169                    74.5527 +- 10.7841      6      good
chromium@505202                    74.3932 +- 8.02473      6      good
chromium@505210                    74.7407 +- 7.39191      6      good
chromium@505210,v8@4ba6f15ece      72.63 +- 1.42409        6      good
chromium@505210,v8@40856948a6      153.562 +- 4.89009      6      bad       <--
chromium@505210,v8@193dcf7693      152.865 +- 14.0291      6      bad
chromium@505210,v8@e1cdda2512      151.885 +- 5.04068      6      bad
chromium@505211                    154.8 +- 6.25931        6      bad
chromium@505212                    155.271 +- 5.57859      6      bad
chromium@505214                    155.124 +- 6.94487      6      bad
chromium@505218                    154.996 +- 8.23264      6      bad
chromium@505234                    152.504 +- 4.09062      6      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.twitter 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/8967041581429472528


For feedback, file a bug with component Speed>Bisection

 Issue 770616  has been merged into this issue.

 Issue 770814  has been merged into this issue.

 Issue 770887  has been merged into this issue.

 Issue 770844  has been merged into this issue.

 Issue 771246  has been merged into this issue.

 Issue 771245  has been merged into this issue.

 Issue 771577  has been merged into this issue.