All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=755605

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=b41b046df89364662a6b1f5fa4ee226ee1e232553b2a9ebba9ce765e68398c22


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

chromium-rel-mac12-mini-8gb

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8971174249935327088

=== BISECT JOB RESULTS ===
NO Perf regression found

Bisect Details
  Configuration: mac_10_12_mini_8gb_perf_bisect
  Benchmark    : loading.desktop
  Metric       : timeToFirstContentfulPaint_avg/pcv1-warm/AllRecipes

Revision             Result                  N
chromium@493999      896.705 +- 1024.44      21      good
chromium@494001      886.767 +- 1043.91      21      bad

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=AllRecipes loading.desktop

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8971174249935327088


For feedback, file a bug with component Speed>Bisection

Just on one page/bot, no ref build, doesn't repro in bisect.