All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=758951

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=5a1a05be8ccae8597b1708d8be37178c973cf75315c8cc437f68f104f045bed2


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

chromium-rel-win7-gpu-intel

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8970287395139301056

=== 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: winx64intel_perf_bisect
  Benchmark    : image_decoding.image_decoding_measurement
  Metric       : ImageDecoding_avg/ImageDecoding_avg
  Change       : 4.53% | 43.35655 -> 45.3194583333

Revision             Result                    N
chromium@495793      43.3566 +- 0.0830135      6      good
chromium@495801      43.1664 +- 0.862437       6      good
chromium@495802      45.535 +- 0.109482        6      bad       <--
chromium@495803      45.2977 +- 0.131316       6      bad
chromium@495805      45.5346 +- 0.141883       6      bad
chromium@495808      45.3195 +- 0.105636       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/8970287395139301056


For feedback, file a bug with component Speed>Bisection