All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=760161

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=292ec3326acfb80139c803183f4a3e745a21f7dfd58d00755356d543a6f2c6a1


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

chromium-rel-win7-gpu-nvidia
chromium-rel-win8-dual

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8969912361091010864

=== 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: winx64nvidia_perf_bisect
  Benchmark    : image_decoding.image_decoding_measurement
  Metric       : ImageDecoding_avg/ImageDecoding_avg
  Change       : 5.81% | 42.6712083333 -> 45.1497666667

Revision             Result                   N
chromium@495801      42.6712 +- 0.287108      6      good
chromium@495802      45.2641 +- 0.502347      6      bad       <--
chromium@495803      45.1864 +- 0.277693      6      bad
chromium@495805      45.2487 +- 0.28212       6      bad
chromium@495808      45.1498 +- 0.646969      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 image_decoding.image_decoding_measurement

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8969912361091010864


For feedback, file a bug with component Speed>Bisection