All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=755580

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=ec7be7f3f8a2fca9a30d340da342986259ed677b2aea15e024b09bee3c3f0e66


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

chromium-rel-mac-retina
chromium-rel-mac11
chromium-rel-mac11-air
chromium-rel-win7-gpu-ati
win-high-dpi

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8971177873345654528

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

Suspected Commit
  Author : Scott Haseley
  Commit : c3f876b18c07c50b360b93fb91ec67549b58deb8
  Date   : Thu Aug 10 00:40:36 2017
  Subject: Use swap time for all first paint times in TBM, UMA, UKM & web perf API

Bisect Details
  Configuration: winx64ati_perf_bisect
  Benchmark    : page_cycler_v2.basic_oopif
  Metric       : timeToFirstContentfulPaint_avg/pcv1-warm/http___www.nationalgeographic.com_
  Change       : 60.67% | 198.347500004 -> 318.678999996

Revision             Result                  N
chromium@493131      198.348 +- 8.39314      8      good
chromium@493175      199.832 +- 5.08532      6      good
chromium@493186      199.182 +- 5.02471      6      good
chromium@493189      197.171 +- 5.7568       5      good
chromium@493190      198.023 +- 4.89849      6      good
chromium@493191      303.023 +- 118.983      6      bad       <--
chromium@493192      325.656 +- 65.0741      6      bad
chromium@493197      330.852 +- 69.481       7      bad
chromium@493218      308.908 +- 126.953      5      bad
chromium@493304      318.679 +- 105.61       5      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=http...www.nationalgeographic.com. page_cycler_v2.basic_oopif

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8971177873345654528


For feedback, file a bug with component Speed>Bisection