All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=747936

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=51a116b5e294b9c46f87410af1ca93e101f0dd23b2674f43aedac9f9f7450127


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

chromium-rel-mac11-air

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8973189371528650656

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

Suspected Commit
  Author : Daniel Vogelheim
  Commit : 5578c07d877cb8bf3ee41439ea1c8ff9c0dd7394
  Date   : Fri Jul 21 14:03:19 2017
  Subject: ScriptRunner can initiate script streaming.

Bisect Details
  Configuration: mac_air_perf_bisect
  Benchmark    : page_cycler_v2_site_isolation.basic_oopif
  Metric       : timeToFirstMeaningfulPaint_avg/pcv1-warm/http___www.fifa.com_
  Change       : 2.46% | 484.099857143 -> 495.996714285

Revision             Result                  N
chromium@488647      484.1 +- 128.81         14      good
chromium@488648      501.438 +- 32.9048      9       bad       <--
chromium@488649      508.366 +- 106.945      14      bad
chromium@488650      506.39 +- 17.8354       9       bad
chromium@488653      511.861 +- 36.8804      9       bad
chromium@488659      506.896 +- 53.1617      14      bad
chromium@488671      529.218 +- 119.188      9       bad
chromium@488694      500.507 +- 28.3904      9       bad
chromium@488741      495.997 +- 33.7384      14      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=http...www.fifa.com. page_cycler_v2_site_isolation.basic_oopif

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8973189371528650656


For feedback, file a bug with component Speed>Bisection