All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=781808

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=164d8f6520f01bc61acdd7fc4cc03e5386d7791f5b30689cf1d0b087869b54eb


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

chromium-rel-mac-retina
chromium-rel-win10
chromium-rel-win7-dual
chromium-rel-win7-gpu-ati
chromium-rel-win7-gpu-intel
chromium-rel-win7-x64-dual
chromium-rel-win8-dual
win-high-dpi

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8963660363960599136

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

Suspected Commit
  Author : Ulan Degenbaev
  Commit : 586067e45dd542a117b67ad66d3b14475d8d571f
  Date   : Thu Nov 02 19:10:00 2017
  Subject: Reland "[heap] Temporarily disable concurrent marking."

Bisect Details
  Configuration: winx64intel_perf_bisect
  Benchmark    : memory.long_running_idle_gmail_background_tbmv2
  Metric       : v8-gc-latency-mark-compactor_max/v8-gc-latency-mark-compactor_max
  Change       : 250.13% | 18.685 -> 65.4215

Revision                           Result                  N
chromium@513697                    18.685 +- 9.83672       6       good
chromium@513718                    12.9591 +- 10.334       9       good
chromium@513719                    14.175 +- 12.9455       8       good
chromium@513719,v8@a274fc6536      13.0933 +- 7.29586      6       good
chromium@513719,v8@694a18781c      11.8315 +- 6.99736      6       good
chromium@513719,v8@586067e45d      66.9487 +- 19.193       6       bad       <--
chromium@513720                    66.8685 +- 61.1065      6       bad
chromium@513721                    55.4339 +- 92.7168      14      bad
chromium@513723                    65.7018 +- 36.3381      9       bad
chromium@513728                    72.1855 +- 24.6581      6       bad
chromium@513738                    65.4215 +- 43.8844      6       bad

To Run This Test
  src/tools/perf/run_benchmark -v --browser=release_x64 --output-format=chartjson --upload-results --pageset-repeat=1 --also-run-disabled-tests memory.long_running_idle_gmail_background_tbmv2

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8963660363960599136


For feedback, file a bug with component Speed>Bisection