All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=753276

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=552668354582185ac59d8ddbc2c73193e5ceff11f45701e8ff6bf70cee096df2


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

android-nexus5
android-nexus5X
android-nexus6
android-nexus7v2
android-one
android-webview-nexus5X
android-webview-nexus6
chromium-rel-mac-retina
chromium-rel-mac11
chromium-rel-mac11-air
chromium-rel-mac11-pro
chromium-rel-mac12
chromium-rel-mac12-mini-8gb
chromium-rel-win10
chromium-rel-win7-gpu-nvidia
win-high-dpi

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8971847218543459728

=== 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: mac_10_12_perf_bisect
  Benchmark    : system_health.memory_desktop
  Metric       : memory:chrome:all_processes:reported_by_chrome:skia:effective_size_avg/load_social/load_social_instagram
  Change       : 148310.84% | 1328.0 -> 1970896.0

Revision                                 Result                  N
chromium@491736                          1328.0 +- 0.0           6      good
chromium@491831                          1328.0 +- 0.0           6      good
chromium@491879                          1328.0 +- 0.0           6      good
chromium@491903                          1328.0 +- 0.0           6      good
chromium@491915                          1328.0 +- 0.0           6      good
chromium@491921                          1328.0 +- 0.0           6      good
chromium@491924                          1328.0 +- 0.0           6      good
chromium@491924,catapult@b0f1e24d46      1328.0 +- 0.0           6      good
chromium@491924,catapult@357e1deefc      1980795 +- 68556.9      6      bad       <--
chromium@491925                          2000572 +- 68533.8      6      bad
chromium@491926                          1970896 +- 54180.7      6      bad

Please refer to the following doc on diagnosing memory regressions:
  https://chromium.googlesource.com/chromium/src/+/master/docs/memory-infra/memory_benchmarks.md

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=load.social.instagram system_health.memory_desktop

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8971847218543459728


For feedback, file a bug with component Speed>Bisection