All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=788393

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=06d649da6af2a598ba3716bca1b250c30f9c93df9415607096a4efdd6ee645f3


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

android-webview-nexus5X

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8962038551086722544

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8961047648077162176

Kicked new bisect.

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

Suspected Commit
  Author : Hans Wennborg
  Commit : 85023f0253e73844e0bdf00f134ddbeeae057aed
  Date   : Tue Nov 21 15:27:34 2017
  Subject: Roll clang 317263:318667.

Bisect Details
  Configuration: android_nexus5X_perf_bisect
  Benchmark    : rasterize_and_record_micro.top_25
  Metric       : rasterize_time/file___static_top_25_wordpress.html
  Change       : 6.50% | 3.6845 -> 3.92416666667

Revision             Result                    N
chromium@518212      3.6845 +- 0.0865072       6      good
chromium@518242      3.66817 +- 0.060273       6      good
chromium@518257      3.67567 +- 0.0495311      6      good
chromium@518258      3.9385 +- 0.0179304       6      bad       <--
chromium@518259      3.92617 +- 0.0409736      6      bad
chromium@518261      3.9325 +- 0.0608892       6      bad
chromium@518264      3.92883 +- 0.0232128      6      bad
chromium@518271      3.92417 +- 0.0386631      6      bad

To Run This Test
  src/tools/perf/run_benchmark -v --browser=android-chromium --output-format=chartjson --upload-results --pageset-repeat=1 --also-run-disabled-tests --story-filter=file...static.top.25.wordpress.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/8961047648077162176


For feedback, file a bug with component Speed>Bisection

The bisect only seems to have found a 6.5% regression, not the 81.5% that's in the title. Also the "all graphs for this bug" shows no graphs and "WARNING: There appear to be no alerts associated with this bug."

Closing as wontfix.