All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=784345

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=a72be0e5f7ad256ff1cd00f73748e800e17d0c30c6e14ae4cb5c29c6ca9c453f


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

chromium-rel-mac11
chromium-rel-win10
chromium-rel-win7-dual
chromium-rel-win7-gpu-ati
chromium-rel-win7-gpu-intel
chromium-rel-win7-gpu-nvidia
chromium-rel-win7-x64-dual
chromium-rel-win8-dual
win-high-dpi

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8963036658535912624

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8963036557935327840

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

Suspected Commit
  Author : Kouhei Ueno
  Commit : e1cfaee91ad08478fbd956fcd73d570032702397
  Date   : Thu Nov 09 08:23:01 2017
  Subject: Revert "Make script cache hits async"

Bisect Details
  Configuration: winx64_high_dpi_perf_bisect
  Benchmark    : loading.desktop
  Metric       : cpuTimeToFirstMeaningfulPaint_avg/cold/AllRecipes
  Change       : 118.27% | 716.804833333 -> 1564.56416667

Revision             Result                  N
chromium@515117      716.805 +- 120.69       6      good
chromium@515120      697.971 +- 50.2653      6      good
chromium@515121      1632.48 +- 89.118       6      bad       <--
chromium@515122      1562.48 +- 272.142      6      bad
chromium@515123      1577.7 +- 233.046       6      bad
chromium@515129      1573.36 +- 255.509      6      bad
chromium@515140      1614.94 +- 209.424      6      bad
chromium@515162      1564.56 +- 261.614      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=AllRecipes loading.desktop

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8963036658535912624


For feedback, file a bug with component Speed>Bisection

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

Suspected Commit
  Author : Nghia Nguyen
  Commit : 564e33d345ee080be36ad0e6b6107afbcd09df4d
  Date   : Tue Nov 07 14:06:23 2017
  Subject: Update wprgo binaries to latest version

Bisect Details
  Configuration: winx64ati_perf_bisect
  Benchmark    : loading.desktop
  Metric       : timeToFirstContentfulPaint_avg/warm/24h
  Change       : 3.83% | 663.604166672 -> 689.047499994

Revision                                 Result                  N
chromium@515134                          663.604 +- 25.1273      6      good
chromium@515147                          660.193 +- 9.81061      6      good
chromium@515148                          663.363 +- 22.4538      6      good
chromium@515148,catapult@a7fb6add75      665.843 +- 23.478       6      good
chromium@515148,catapult@b33d83ad5d      675.573 +- 10.5489      6      good
chromium@515148,catapult@564e33d345      689.312 +- 5.11407      6      bad       <--
chromium@515148,catapult@c169bba255      689.004 +- 5.64447      6      bad
chromium@515149                          688.337 +- 5.18991      6      bad
chromium@515151                          689.338 +- 10.0302      6      bad
chromium@515154                          688.379 +- 6.50471      6      bad
chromium@515160                          690.21 +- 4.31281       6      bad
chromium@515186                          689.047 +- 4.6186       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=24h loading.desktop

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8963036557935327840


For feedback, file a bug with component Speed>Bisection