All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=763855

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=fd9d2df394aac01bd300f1451af201e9845ccf1670d49180dd2d29d1eb39420f


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

chromium-rel-mac-retina
chromium-rel-mac12
chromium-rel-win10
chromium-rel-win7-dual
chromium-rel-win7-gpu-ati
chromium-rel-win7-gpu-intel
chromium-rel-win7-x64-dual
chromium-rel-win8-dual
linux-release
win-high-dpi

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8968753084577100000

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

Suspected Commit
  Author : xunjieli
  Commit : 724bb776bcdea642a5bc9cc20fe14bb0282b4900
  Date   : Wed Sep 06 14:29:20 2017
  Subject: [Telemetry] Use --ignore-certificate-errors-spki-list to bypass cert errors

Bisect Details
  Configuration: winx64intel_perf_bisect
  Benchmark    : loading.desktop
  Metric       : timeToFirstContentfulPaint_avg/pcv1-warm/yahoo.co.jp
  Change       : 577.98% | 104.79549998 -> 710.490500023

Revision                                 Result                  N
chromium@500316                          104.795 +- 48.7969      6      good
chromium@500331                          112.27 +- 57.3773       6      good
chromium@500339                          102.641 +- 46.1647      6      good
chromium@500343                          113.468 +- 52.9603      6      good
chromium@500344                          101.805 +- 44.5867      6      good
chromium@500344,catapult@c5a474f50f      101.553 +- 47.4852      6      good
chromium@500344,catapult@724bb776bc      710.125 +- 5.06804      6      bad       <--
chromium@500344,catapult@80c47581b1      704.935 +- 15.1256      6      bad
chromium@500344,catapult@4f611510b9      711.831 +- 7.91792      6      bad
chromium@500344,catapult@442f46edf7      720.55 +- 35.7923       6      bad
chromium@500345                          710.228 +- 7.8786       6      bad
chromium@500346                          706.9 +- 6.38753        6      bad
chromium@500376                          710.491 +- 2.92603      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=yahoo.co.jp loading.desktop

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8968753084577100000


For feedback, file a bug with component Speed>Bisection