All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=782708

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=e9ea00b57efd89327589f4267eea3a10325f994073d3c77d1dc4ff78ea037a5c


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

android-nexus5
android-nexus5X
android-one
android-webview-nexus5X
android-webview-nexus6
chromium-rel-mac-retina
chromium-rel-mac11
chromium-rel-mac11-pro
chromium-rel-mac12-mini-8gb
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
linux-release

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8963478246180967504

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

Hi wkorman@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 : Walter Korman
  Commit : db0e590542ca41876ea92d6b9413073e9fb0ef46
  Date   : Tue Nov 07 02:12:29 2017
  Subject: Update static snapshot for majority of top 25 sites.

Bisect Details
  Configuration: win_perf_bisect
  Benchmark    : rasterize_and_record_micro.top_25
  Metric       : rasterize_time/file___static_top_25_yahoogames.html
  Change       : 773.93% | 1.5175 -> 13.2618333333

Revision             Result                    N
chromium@514319      1.5175 +- 0.0808053       6      good
chromium@514344      1.50383 +- 0.0865034      6      good
chromium@514356      1.5095 +- 0.0800094       6      good
chromium@514357      12.9295 +- 0.0864494      6      bad       <--
chromium@514358      12.9917 +- 0.237275       6      bad
chromium@514359      12.9558 +- 0.158905       6      bad
chromium@514362      12.911 +- 0.219144        6      bad
chromium@514368      13.3818 +- 0.101808       6      bad
chromium@514417      13.2618 +- 0.175165       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=file...static.top.25.yahoogames.html 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/8963478246180967504


For feedback, file a bug with component Speed>Bisection

This is expected and should be the new baseline. The new page snapshots include images and sub-frames in many cases where they were omitted in the previous snapshot.

Duping to existing issue tracking that.