All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=740537

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=a581f968c61d20c6c4bb2a05054d6b1ef4684e9dc4d2fe9e69d0b7e640d3ab9f


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

win-high-dpi

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8974450419992912288

=== 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-warm/FarsNews
  Change       : 52.36% | 845.6275 -> 402.879666667

Revision             Result                  N
chromium@480312      845.627 +- 73.089       6      good
chromium@480336      878.179 +- 190.17       6      good
chromium@480339      862.105 +- 230.331      6      good
chromium@480341      909.439 +- 75.2005      6      good
chromium@480342      383.168 +- 117.146      6      bad       <--
chromium@480348      377.429 +- 97.0288      6      bad
chromium@480359      402.88 +- 105.979       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=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/8974450419992912288


For feedback, file a bug with component Speed>Bisection