Perfherder has detected a browsertime performance regression from push [76116e6c2476f694d9cd5db9c69d9065e3b2cbbd](https://hg.mozilla.org/integration/autoland/pushloghtml?changeset=76116e6c2476f694d9cd5db9c69d9065e3b2cbbd). As author of one of the patches included in that push, we need your help to address this regression. ### Regressions: | **Ratio** | **Test** | **Platform** | **Options** | **Absolute values (old vs new)** | **Performance Profiles** | |--|--|--|--|--|--| | [9%](https://treeherder.mozilla.org/perfherder/graphs?timerange=1209600&series=autoland,3776916,1,13) | [facebook](https://firefox-source-docs.mozilla.org/testing/perfdocs/raptor.html#facebook-d) LastVisualChange | linux1804-64-shippable-qr | fission warm webrender | [892.11](https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/D7cLsvwlTTKWmuct7VIE_g/runs/0/artifacts/public/test_info/browsertime-results.tgz) -> [973.81](https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/DlLqEceUQyGzOq94_EjmkA/runs/0/artifacts/public/test_info/browsertime-results.tgz) | [Before](https://profiler.firefox.com/from-url/https%3A%2F%2Ffirefox-ci-tc.services.mozilla.com%2Fapi%2Fqueue%2Fv1%2Ftask%2FD7cLsvwlTTKWmuct7VIE_g%2Fruns%2F0%2Fartifacts%2Fpublic%2Ftest_info%2Fprofile_facebook.zip)/[After](https://profiler.firefox.com/from-url/https%3A%2F%2Ffirefox-ci-tc.services.mozilla.com%2Fapi%2Fqueue%2Fv1%2Ftask%2FDlLqEceUQyGzOq94_EjmkA%2Fruns%2F0%2Fartifacts%2Fpublic%2Ftest_info%2Fprofile_facebook.zip) | | [5%](https://treeherder.mozilla.org/perfherder/graphs?timerange=1209600&series=autoland,3777086,1,13) | [youtube](https://firefox-source-docs.mozilla.org/testing/perfdocs/raptor.html#youtube-d) SpeedIndex | linux1804-64-shippable-qr | fission warm webrender | [1,198.71](https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/bl5j2M1QQhmacuUtGtGXtg/runs/0/artifacts/public/test_info/browsertime-results.tgz) -> [1,252.77](https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/M0SGlAX1S8-Z0d6rcaGWJQ/runs/0/artifacts/public/test_info/browsertime-results.tgz) | [Before](https://profiler.firefox.com/from-url/https%3A%2F%2Ffirefox-ci-tc.services.mozilla.com%2Fapi%2Fqueue%2Fv1%2Ftask%2Fbl5j2M1QQhmacuUtGtGXtg%2Fruns%2F0%2Fartifacts%2Fpublic%2Ftest_info%2Fprofile_youtube.zip)/[After](https://profiler.firefox.com/from-url/https%3A%2F%2Ffirefox-ci-tc.services.mozilla.com%2Fapi%2Fqueue%2Fv1%2Ftask%2FM0SGlAX1S8-Z0d6rcaGWJQ%2Fruns%2F0%2Fartifacts%2Fpublic%2Ftest_info%2Fprofile_youtube.zip) | | [4%](https://treeherder.mozilla.org/perfherder/graphs?timerange=1209600&series=autoland,3869383,1,13) | [yahoo-mail](https://firefox-source-docs.mozilla.org/testing/perfdocs/raptor.html#yahoo-mail-d) SpeedIndex | linux1804-64-shippable-qr | fission warm webrender | [194.67](https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/egZTJg8DRlCQM5a-s4TqTw/runs/0/artifacts/public/test_info/browsertime-results.tgz) -> [201.97](https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/aaHbT_0NSgKMgMg0QUzfng/runs/0/artifacts/public/test_info/browsertime-results.tgz) | [Before](https://profiler.firefox.com/from-url/https%3A%2F%2Ffirefox-ci-tc.services.mozilla.com%2Fapi%2Fqueue%2Fv1%2Ftask%2FegZTJg8DRlCQM5a-s4TqTw%2Fruns%2F0%2Fartifacts%2Fpublic%2Ftest_info%2Fprofile_yahoo-mail.zip)/[After](https://profiler.firefox.com/from-url/https%3A%2F%2Ffirefox-ci-tc.services.mozilla.com%2Fapi%2Fqueue%2Fv1%2Ftask%2FaaHbT_0NSgKMgMg0QUzfng%2Fruns%2F0%2Fartifacts%2Fpublic%2Ftest_info%2Fprofile_yahoo-mail.zip) | Details of the alert can be found in the [alert summary](https://treeherder.mozilla.org/perfherder/alerts?id=39566), including links to graphs and comparisons for each of the affected tests. Please follow our [guide to handling regression bugs](https://wiki.mozilla.org/TestEngineering/Performance/Handling_regression_bugs) and **let us know your plans within 3 business days, or the offending patch(es) may be backed out** in accordance with our [regression policy](https://www.mozilla.org/en-US/about/governance/policies/regressions/). If you need the profiling jobs you can trigger them yourself from treeherder job view or ask a sheriff to do that for you. For more information on performance sheriffing please see our [FAQ](https://wiki.mozilla.org/TestEngineering/Performance/FAQ).
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Perfherder has detected a browsertime performance regression from push [890cdd99877113f78366cea8477d27bf5511781d](https://hg.mozilla.org/integration/autoland/pushloghtml?changeset=890cdd99877113f78366cea8477d27bf5511781d). As author of one of the patches included in that push, we need your help to address this regression. ### Regressions: | **Ratio** | **Test** | **Platform** | **Options** | **Absolute values (old vs new)** | **Performance Profiles** | |--|--|--|--|--|--| | [9%](https://treeherder.mozilla.org/perfherder/graphs?timerange=1209600&series=autoland,3776916,1,13) | [facebook](https://firefox-source-docs.mozilla.org/testing/perfdocs/raptor.html#facebook-d) LastVisualChange | linux1804-64-shippable-qr | fission warm webrender | [892.11](https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/D7cLsvwlTTKWmuct7VIE_g/runs/0/artifacts/public/test_info/browsertime-results.tgz) -> [973.81](https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/DlLqEceUQyGzOq94_EjmkA/runs/0/artifacts/public/test_info/browsertime-results.tgz) | [Before](https://profiler.firefox.com/from-url/https%3A%2F%2Ffirefox-ci-tc.services.mozilla.com%2Fapi%2Fqueue%2Fv1%2Ftask%2FD7cLsvwlTTKWmuct7VIE_g%2Fruns%2F0%2Fartifacts%2Fpublic%2Ftest_info%2Fprofile_facebook.zip)/[After](https://profiler.firefox.com/from-url/https%3A%2F%2Ffirefox-ci-tc.services.mozilla.com%2Fapi%2Fqueue%2Fv1%2Ftask%2FDlLqEceUQyGzOq94_EjmkA%2Fruns%2F0%2Fartifacts%2Fpublic%2Ftest_info%2Fprofile_facebook.zip) | | [5%](https://treeherder.mozilla.org/perfherder/graphs?timerange=1209600&series=autoland,3777086,1,13) | [youtube](https://firefox-source-docs.mozilla.org/testing/perfdocs/raptor.html#youtube-d) SpeedIndex | linux1804-64-shippable-qr | fission warm webrender | [1,198.71](https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/bl5j2M1QQhmacuUtGtGXtg/runs/0/artifacts/public/test_info/browsertime-results.tgz) -> [1,252.77](https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/M0SGlAX1S8-Z0d6rcaGWJQ/runs/0/artifacts/public/test_info/browsertime-results.tgz) | [Before](https://profiler.firefox.com/from-url/https%3A%2F%2Ffirefox-ci-tc.services.mozilla.com%2Fapi%2Fqueue%2Fv1%2Ftask%2Fbl5j2M1QQhmacuUtGtGXtg%2Fruns%2F0%2Fartifacts%2Fpublic%2Ftest_info%2Fprofile_youtube.zip)/[After](https://profiler.firefox.com/from-url/https%3A%2F%2Ffirefox-ci-tc.services.mozilla.com%2Fapi%2Fqueue%2Fv1%2Ftask%2FM0SGlAX1S8-Z0d6rcaGWJQ%2Fruns%2F0%2Fartifacts%2Fpublic%2Ftest_info%2Fprofile_youtube.zip) | | [4%](https://treeherder.mozilla.org/perfherder/graphs?timerange=1209600&series=autoland,3869383,1,13) | [yahoo-mail](https://firefox-source-docs.mozilla.org/testing/perfdocs/raptor.html#yahoo-mail-d) SpeedIndex | linux1804-64-shippable-qr | fission warm webrender | [194.67](https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/egZTJg8DRlCQM5a-s4TqTw/runs/0/artifacts/public/test_info/browsertime-results.tgz) -> [201.97](https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/aaHbT_0NSgKMgMg0QUzfng/runs/0/artifacts/public/test_info/browsertime-results.tgz) | [Before](https://profiler.firefox.com/from-url/https%3A%2F%2Ffirefox-ci-tc.services.mozilla.com%2Fapi%2Fqueue%2Fv1%2Ftask%2FegZTJg8DRlCQM5a-s4TqTw%2Fruns%2F0%2Fartifacts%2Fpublic%2Ftest_info%2Fprofile_yahoo-mail.zip)/[After](https://profiler.firefox.com/from-url/https%3A%2F%2Ffirefox-ci-tc.services.mozilla.com%2Fapi%2Fqueue%2Fv1%2Ftask%2FaaHbT_0NSgKMgMg0QUzfng%2Fruns%2F0%2Fartifacts%2Fpublic%2Ftest_info%2Fprofile_yahoo-mail.zip) | Details of the alert can be found in the [alert summary](https://treeherder.mozilla.org/perfherder/alerts?id=39566), including links to graphs and comparisons for each of the affected tests. Please follow our [guide to handling regression bugs](https://wiki.mozilla.org/TestEngineering/Performance/Handling_regression_bugs) and **let us know your plans within 3 business days, or the offending patch(es) may be backed out** in accordance with our [regression policy](https://www.mozilla.org/en-US/about/governance/policies/regressions/). If you need the profiling jobs you can trigger them yourself from treeherder job view or ask a sheriff to do that for you. For more information on performance sheriffing please see our [FAQ](https://wiki.mozilla.org/TestEngineering/Performance/FAQ).