All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=755980

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=9a0e46d8a32f8fe7b82626164e6fd1f33057d8ea95386e1a0328d02c897195e7


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

chromium-rel-mac-retina
chromium-rel-mac11
chromium-rel-mac12
chromium-rel-win7-dual
chromium-rel-win7-gpu-intel
chromium-rel-win8-dual

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8971096681095914000

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

Suspected Commit
  Author : perezju
  Commit : 122dd5e91bf64888049459ce73a8fd34c084cfe0
  Date   : Mon Aug 14 12:28:51 2017
  Subject: [Telemetry] Reuse shared state between story runs

Bisect Details
  Configuration: win_8_perf_bisect
  Benchmark    : page_cycler_v2_site_isolation.basic_oopif
  Metric       : timeToFirstContentfulPaint_avg/pcv1-warm/http___booking.com
  Change       : 2128.22% | 105.250166667 -> 2345.20466667

Revision                                 Result                  N
chromium@494045                          105.25 +- 8.90505       6      good
chromium@494046                          103.816 +- 4.58523      6      good
chromium@494046,catapult@122dd5e91b      2365.1 +- 142.043       6      bad       <--
chromium@494047                          2316.38 +- 288.579      6      bad
chromium@494048                          2303.56 +- 165.7        6      bad
chromium@494051                          2449.1 +- 364.535       6      bad
chromium@494057                          2296.76 +- 175.999      6      bad
chromium@494069                          2384.7 +- 189.105       6      bad
chromium@494093                          2318.4 +- 1085.36       6      bad
chromium@494141                          2345.2 +- 178.018       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=http...booking.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/8971096681095914000


For feedback, file a bug with component Speed>Bisection