All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=753656

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=10f7c509ac2cab1d40a07b5cbde6f5a095ffddf6c67569fb6eddb5ce3c037965


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

chromium-rel-win7-x64-dual

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8971769939830114528

=== Auto-CCing suspected CL author xunjieli@chromium.org ===

Hi xunjieli@chromium.org, the bisect results pointed to your CL, please take a look at the
results.


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

Suspected Commit
  Author : Helen Li
  Commit : 05ee1dbfaf0aa7c03b9ea2040f0345277042d0f1
  Date   : Mon Jul 31 13:24:01 2017
  Subject: [wpr-go] Switch system_health_desktop.json to use go

Bisect Details
  Configuration: win_x64_perf_bisect
  Benchmark    : system_health.common_desktop
  Metric       : timeToFirstMeaningfulPaint_avg/load_media/load_media_dailymotion
  Change       : 25.03% | 2251.524 -> 2815.15916666

Revision             Result                  N
chromium@490750      2251.52 +- 464.427      6      good
chromium@490751      3118.57 +- 2184.64      6      bad       <--
chromium@490752      2889.33 +- 1420.23      9      bad
chromium@490754      3398.78 +- 1929.12      6      bad
chromium@490758      3272.54 +- 1590.35      6      bad
chromium@490765      3068.13 +- 1415.22      6      bad
chromium@490780      2815.16 +- 425.71       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=load.media.dailymotion system_health.common_desktop

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8971769939830114528


For feedback, file a bug with component Speed>Bisection

Thanks for filing the alert. Regressions in timeToFirstMeaningfulPaint_avg for system_health.common_desktop is being tracked in  Issue 751983