All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=768527

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=8c0422acb038a9c74eae55418177139b510c8af1b4da30d82a554f62c1653441


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

android-nexus5X
android-nexus7v2
android-webview-nexus5X
chromium-rel-mac-retina
chromium-rel-mac11
chromium-rel-mac11-pro
chromium-rel-mac12
chromium-rel-win7-dual
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/8967447536480486272

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

Suspected Commit
  Author : Brian White
  Commit : 7ac4e75787ae3b44a33026e4e3671410c81a273c
  Date   : Sun Sep 24 04:33:45 2017
  Subject: Validate histograms around IPC calls on Android.

Bisect Details
  Configuration: android_webview_arm64_aosp_perf_bisect
  Benchmark    : thread_times.key_silk_cases
  Metric       : thread_browser_cpu_time_per_frame/http___jsfiddle.net_vBQHH_11_show_
  Change       : 300.96% | 1.93200727421 -> 7.74653201204

Revision             Result                    N
chromium@503949      1.93201 +- 0.0245248      6      good
chromium@503950      1.93007 +- 0.026652       6      good
chromium@503951      7.74653 +- 0.154159       6      bad       <--

To Run This Test
  src/tools/perf/run_benchmark -v --browser=android-webview --output-format=chartjson --upload-results --pageset-repeat=1 --also-run-disabled-tests --story-filter=http...jsfiddle.net.vBQHH.11.show. thread_times.key_silk_cases

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8967447536480486272


For feedback, file a bug with component Speed>Bisection