All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=753822

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=aef8a24be81a391a3574ce915a620fcc180fbb0320336bdcab6818e8d33cf9f2


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

android-nexus7v2

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8971726202813631440

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

Suspected Commit
  Author : xunjieli
  Commit : 357e1deefca78c61e457f340270c9cd6f38321f5
  Date   : Thu Aug 03 22:16:30 2017
  Subject: [wpr-go] Use a dummy cert if no cert is recorded

Bisect Details
  Configuration: android_nexus7_perf_bisect
  Benchmark    : tracing.tracing_with_debug_overhead
  Metric       : trace_import_duration_avg/trace_import_duration_avg
  Change       : 15.93% | 1814.1682963 -> 2087.78051852

Revision                                 Result                  N
chromium@491783                          1814.17 +- 195.118      6      good
chromium@491859                          1842.72 +- 149.603      9      good
chromium@491897                          1884.52 +- 336.811      9      good
chromium@491916                          1804.12 +- 35.5904      6      good
chromium@491921                          1859.65 +- 351.925      9      good
chromium@491924                          1834.0 +- 136.592       6      good
chromium@491924,catapult@b0f1e24d46      1813.55 +- 67.1744      6      good
chromium@491924,catapult@357e1deefc      2138.54 +- 171.65       6      bad       <--
chromium@491925                          2132.8 +- 364.899       6      bad
chromium@491926                          2117.8 +- 145.482       6      bad
chromium@491935                          2087.78 +- 226.149      9      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 tracing.tracing_with_debug_overhead

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8971726202813631440


For feedback, file a bug with component Speed>Bisection