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25%-28.9% regression in speedometer at 459799:459982 |
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Issue descriptionSee the link to graphs below.
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Mar 29 2017
Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8983782315116467312
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Mar 29 2017
=== Auto-CCing suspected CL author pkotwicz@chromium.org === Hi pkotwicz@chromium.org, the bisect results pointed to your CL, please take a look at the results. === BISECT JOB RESULTS === Perf regression found with culprit Suspected Commit Author : pkotwicz Commit : 0e44ebc7dcf7c343d45694b97b2edc455f1a6256 Date : Mon Mar 27 16:25:49 2017 Subject: [Android WebAPKs] Don't navigate WebAPK when launching it from launcher Bisect Details Configuration: winx64_zen_perf_bisect Benchmark : speedometer Metric : EmberJS-TodoMVC/EmberJS-TodoMVC Change : 5.62% | 1230.61942857 -> 1263.19841667 Revision Result N chromium@459798 1230.62 +- 221.23 14 good chromium@459799 1311.96 +- 269.026 9 bad <-- chromium@459800 1287.01 +- 111.15 9 bad chromium@459801 1317.68 +- 182.315 9 bad chromium@459804 1289.44 +- 107.646 9 bad chromium@459809 1274.31 +- 218.387 21 bad chromium@459822 1274.48 +- 158.081 14 bad chromium@459844 1232.08 +- 111.767 14 bad chromium@459890 1250.27 +- 215.756 9 bad chromium@459982 1263.2 +- 101.416 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 speedometer Debug Info https://chromeperf.appspot.com/buildbucket_job_status/8983782315116467312 Is this bisect wrong? https://chromeperf.appspot.com/bad_bisect?try_job_id=6453990407012352 | O O | Visit http://www.chromium.org/developers/speed-infra/perf-bug-faq | X | for more information addressing perf regression bugs. For feedback, | / \ | file a bug with component Speed>Bisection. Thank you!
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Mar 29 2017
It is impossible for my CL to be the cause. My CL modifies Android only code (which is run only in a super weird configuration of Chrome for Android) Reassigning to tebbi@ to do bisect. The bisect results look super duper suspicious. For instance revisions 459798 and 459844 have a very similar result (which landed before and after my CL respectively)
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Apr 5 2017
Ref build is also having the same spike => bot problem. |
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Comment 1 by tebbi@chromium.org
, Mar 29 2017