All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=740533

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=b159bce91976f9200cedb37085d93a5b8f081ff11897993062366c456787ea2f


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

win-high-dpi

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8974450487437157200

=== 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: winx64_high_dpi_perf_bisect
  Benchmark    : loading.desktop
  Metric       : timeToFirstMeaningfulPaint_avg/pcv1-cold/FarsNews
  Change       : 18.94% | 1524.84235714 -> 1236.02835714

Revision             Result                  N
chromium@480312      1524.84 +- 871.193      14      good
chromium@480336      1651.52 +- 149.873      6       good
chromium@480339      1551.0 +- 525.963       9       good
chromium@480341      1652.68 +- 578.228      9       good
chromium@480342      1227.24 +- 209.123      6       bad       <--
chromium@480348      1166.0 +- 138.712       6       bad
chromium@480359      1236.03 +- 295.432      14      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=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/8974450487437157200


For feedback, file a bug with component Speed>Bisection