All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=758962

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=e139abe899786e31fa5c010313bc67aa50c0aee52e7d1e1b188b13328c4d9dd0


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

chromium-rel-win7-dual

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8970286468189206896

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

Suspected Commit
  Author : Nico Weber
  Commit : 7cd2f6bd73c6a9c6200704e995b18ebb3168ead6
  Date   : Sat Aug 19 04:23:54 2017
  Subject: win: Turn off clang-by-default again for now.

Bisect Details
  Configuration: win_perf_bisect
  Benchmark    : rasterize_and_record_micro.top_25
  Metric       : rasterize_time/https___www.google.com__hl_en_q_barack+obama
  Change       : 31.89% | 1.55883333333 -> 2.056

Revision             Result                    N
chromium@495791      1.55883 +- 0.0349118      6      good
chromium@495800      1.572 +- 0.0344384        6      good
chromium@495801      1.58067 +- 0.0355715      6      good
chromium@495802      2.06217 +- 0.024059       6      bad       <--
chromium@495804      2.06317 +- 0.0347107      6      bad
chromium@495808      2.056 +- 0.0324037        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=https...www.google.com..hl.en.q.barack.obama rasterize_and_record_micro.top_25

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8970286468189206896


For feedback, file a bug with component Speed>Bisection