All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=740536

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=0dca7741033872454fafa8fa3ea27d79dbf3b206bf6c7b45d2dbd0de549b2a2c


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

chromium-rel-mac12-mini-8gb

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8974450437751193360

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

Suspected Commit
  Author : Yutaka Hirano
  Commit : 84047549ac37bab70d7306566c912e59131f3e1f
  Date   : Mon Jun 19 04:16:15 2017
  Subject: [Loading] Save one post-task when the data pipe is ready on arrival

Bisect Details
  Configuration: mac_10_12_mini_8gb_perf_bisect
  Benchmark    : loading.desktop
  Metric       : cpuTimeToFirstMeaningfulPaint_avg/pcv1-cold/FarsNews
  Change       : 44.92% | 956.075166667 -> 526.652166667

Revision             Result                  N
chromium@480312      956.075 +- 168.133      6      good
chromium@480335      956.843 +- 203.93       6      good
chromium@480341      908.96 +- 324.155       6      good
chromium@480342      522.518 +- 67.337       5      bad       <--
chromium@480343      536.181 +- 113.398      6      bad
chromium@480344      580.201 +- 101.492      6      bad
chromium@480346      536.509 +- 93.4541      5      bad
chromium@480357      526.652 +- 94.1814      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=FarsNews loading.desktop

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8974450437751193360


For feedback, file a bug with component Speed>Bisection