bugzilla-data-low.json

{"bugs":[{"creation_time":"2017-02-22T23:15:05Z","component":"Graphics","op_sys":"Unspecified","status":"ASSIGNED","last_change_time":"2025-04-24T15:29:17Z","id":1341913,"priority":"P3","summary":"Stop looking up GLContext symbols for every new window","keywords":["perf"],"severity":"S3"},{"id":1522282,"last_change_time":"2025-03-21T02:42:31Z","status":"ASSIGNED","op_sys":"Android","creation_time":"2019-01-23T21:52:44Z","component":"Performance: Navigation","severity":"S3","summary":"Delayed image loading on low end ARM devices","priority":"P1","keywords":["perf:pageload"]},{"keywords":["perf:startup"],"summary":"Investigate merging shader cache files","priority":"P3","severity":"S3","status":"ASSIGNED","last_change_time":"2022-10-12T00:08:45Z","id":1631949,"component":"Graphics","creation_time":"2020-04-21T20:52:29Z","op_sys":"Unspecified"},{"op_sys":"Unspecified","component":"Graphics: Text","creation_time":"2026-01-05T20:54:42Z","id":2008619,"status":"ASSIGNED","last_change_time":"2026-03-25T14:31:22Z","severity":"S4","keywords":[],"priority":"--","summary":"Text shaping word cache adds a lot of overhead during Editor-TipTap"},{"op_sys":"Windows Vista","creation_time":"2009-04-01T20:00:41Z","component":"Bookmarks & History","id":486378,"last_change_time":"2023-05-16T02:23:47Z","status":"NEW","severity":"S3","summary":"Poor performance using bookmarks menu with large amounts of bookmarks.","priority":"P3","keywords":["blocked-ux","perf"]},{"severity":"N/A","priority":"P3","summary":"[meta] Implement an Asynchronous API for opening container query nodes","keywords":["main-thread-io","meta","perf","perf:frontend","perf:responsiveness"],"id":490714,"status":"NEW","last_change_time":"2025-03-11T07:58:22Z","op_sys":"All","creation_time":"2009-04-29T22:35:30Z","component":"Places"},{"op_sys":"All","creation_time":"2010-06-29T14:36:04Z","component":"Layout: Columns","id":575614,"last_change_time":"2022-10-10T22:59:55Z","status":"NEW","severity":"S3","priority":"--","summary":"{inc} Resizing window is slow for long list with multicol (from \"-moz-column-count: 3\" or \"column-width: 20em;\")","keywords":["perf","perf:responsiveness","testcase"]},{"op_sys":"macOS","creation_time":"2010-11-19T15:34:28Z","component":"XPConnect","id":613498,"status":"NEW","last_change_time":"2025-03-11T08:46:07Z","severity":"S3","priority":"--","summary":"Very slow chrome to content DOM access","keywords":["perf","perf:pageload"]},{"severity":"S3","keywords":["perf","perf:resource-use"],"summary":"throttle animation in completely obscured windows (virtual desktop, minimised, hidden behind other fullscreened windows)","priority":"P3","id":646937,"status":"NEW","last_change_time":"2022-10-10T23:24:13Z","op_sys":"Linux","component":"Widget","creation_time":"2011-03-31T18:37:55Z"},{"status":"NEW","last_change_time":"2025-09-29T14:01:38Z","id":661590,"creation_time":"2011-06-02T18:09:59Z","component":"Places","op_sys":"All","priority":"P3","summary":"Repeated calls to location.hash = \"#foo\" cause large amounts of disk activity","keywords":["perf","perf:responsiveness"],"severity":"S3"},{"op_sys":"All","creation_time":"2011-12-19T09:05:20Z","component":"Graphics: WebRender","id":711924,"status":"NEW","last_change_time":"2024-04-08T16:58:41Z","severity":"S3","summary":"Compositing/present still hapens when the only changing parts are out of the viewport","priority":"--","keywords":["perf","perf:resource-use"]},{"severity":"S3","priority":"--","summary":"IE10 Test Drive: ParticleAcceleration Canvas 2D demo is slow","keywords":["perf"],"op_sys":"All","creation_time":"2012-06-03T03:18:54Z","component":"Graphics: Canvas2D","id":760888,"last_change_time":"2024-04-05T11:37:58Z","status":"NEW"},{"status":"NEW","last_change_time":"2023-06-05T16:31:57Z","id":803709,"component":"Networking","creation_time":"2012-10-19T21:25:22Z","op_sys":"All","keywords":["perf:resource-use"],"summary":"We appear to be copying large data URIs over and over in nsSimpleURI.","priority":"P3","severity":"S3"},{"keywords":["perf:responsiveness"],"priority":"P3","summary":"Processing http://lib.tkk.fi/Dipl/2002/urn007413.pdf is slow, and its text layer is all messed up","severity":"S3","status":"NEW","last_change_time":"2025-03-31T14:05:54Z","id":810214,"component":"PDF Viewer","creation_time":"2012-11-09T08:29:30Z","op_sys":"Linux"},{"summary":"janky Scrolling on smartsheet.com Sheets","priority":"--","keywords":["perf","perf:responsiveness"],"severity":"S3","creation_time":"2012-12-14T13:46:12Z","component":"CSS Parsing and Computation","op_sys":"Windows 7","status":"NEW","last_change_time":"2023-03-01T12:04:23Z","id":821693},{"id":827440,"last_change_time":"2022-11-24T06:34:31Z","status":"NEW","op_sys":"Windows 7","component":"Graphics: ImageLib","creation_time":"2013-01-07T19:06:03Z","severity":"S3","keywords":["perf"],"summary":"nsIconChannel::AsyncOpen can block","priority":"--"},{"priority":"--","summary":"Opening huge mercurial long commit page freezing Firefox","keywords":["perf"],"severity":"S3","last_change_time":"2022-10-29T12:12:42Z","status":"NEW","id":827937,"creation_time":"2013-01-08T19:17:33Z","component":"Layout","op_sys":"Windows 8"},{"op_sys":"All","creation_time":"2013-01-14T22:07:19Z","component":"SQLite and Embedded Database Bindings","id":830504,"status":"NEW","last_change_time":"2024-08-20T19:28:43Z","severity":"S3","priority":"P3","summary":"Firefox should abort on tryserver when executing SQL on the main thread","keywords":["perf:frontend","perf:responsiveness"]},{"summary":"Use IOUtils for gLastOpenDirectory","priority":"--","keywords":["main-thread-io","perf:frontend"],"severity":"S3","last_change_time":"2023-05-16T02:22:53Z","status":"NEW","id":837989,"creation_time":"2013-02-05T02:16:08Z","component":"General","op_sys":"All"},{"last_change_time":"2024-03-27T16:10:09Z","status":"NEW","id":862383,"creation_time":"2013-04-16T15:29:21Z","component":"Networking: File","op_sys":"macOS","priority":"P3","summary":"nsFileChannel::nsFileChannel causes expensive lstats","keywords":["main-thread-io","perf:responsiveness"],"severity":"S3"},{"status":"NEW","last_change_time":"2024-04-01T16:26:36Z","id":890712,"component":"Networking","creation_time":"2013-07-07T15:57:11Z","op_sys":"All","keywords":["main-thread-io","perf","perf:frontend"],"summary":"nsIOService::NewFileURI is doing main thread IO and causes jank","priority":"P3","severity":"S3"},{"severity":"S3","priority":"--","summary":"Polygon.com page scrolling becomes extremely slow after a while","keywords":["perf"],"id":914595,"last_change_time":"2023-07-27T07:06:57Z","status":"NEW","op_sys":"All","creation_time":"2013-09-10T12:49:00Z","component":"Layout"},{"last_change_time":"2022-10-11T01:07:35Z","status":"NEW","id":917090,"creation_time":"2013-09-17T02:34:03Z","component":"General","op_sys":"All","priority":"--","summary":"Visibility state is not updated when the browser window is obscured or on another workspace","keywords":["perf:resource-use"],"severity":"S3"},{"severity":"S3","keywords":["perf"],"summary":"Optimize GetRootPresContext() to avoid going through the viewmanager / view tree","priority":"--","id":984690,"last_change_time":"2025-12-02T04:57:52Z","status":"NEW","op_sys":"Linux","component":"Layout","creation_time":"2014-03-18T00:14:52Z"},{"keywords":["perf:frontend"],"priority":"--","summary":"Preload panel contents on hover of toolbar button","severity":"S3","component":"Toolbars and Customization","creation_time":"2014-06-10T10:02:00Z","op_sys":"All","last_change_time":"2023-07-19T04:52:40Z","status":"NEW","id":1023152},{"creation_time":"2014-08-02T09:50:40Z","component":"Places","op_sys":"All","last_change_time":"2025-03-11T07:09:11Z","status":"NEW","id":1047817,"summary":"Make bookmarks toolbar view use async openContainer","priority":"P3","keywords":["perf:frontend"],"severity":"S3"},{"op_sys":"Android","creation_time":"2014-11-12T00:22:19Z","component":"JavaScript Engine","id":1097376,"status":"NEW","last_change_time":"2022-10-11T15:57:30Z","severity":"S3","priority":"--","summary":"Poor performance in Ember app Discourse","keywords":["perf"]},{"severity":"S3","keywords":["multiprocess","perf","perf:responsiveness","testcase"],"priority":"P5","summary":"[e10s] There is a delay for about 1 seconds to display <select> drop-down list with 1600+ items","id":1118086,"last_change_time":"2025-12-05T02:06:49Z","status":"NEW","op_sys":"All","component":"Layout: Form Controls","creation_time":"2015-01-06T01:55:10Z"},{"severity":"S3","summary":"[Meta] Move JS parsing off of main thread and enable incremental parsing","priority":"--","keywords":["meta","perf"],"op_sys":"Windows 8.1","creation_time":"2015-04-15T23:32:29Z","component":"JavaScript Engine","id":1154987,"last_change_time":"2023-10-11T11:00:04Z","status":"NEW"},{"status":"NEW","last_change_time":"2024-04-02T23:00:44Z","id":1155307,"creation_time":"2015-04-16T18:22:07Z","component":"Graphics: WebRender","op_sys":"All","priority":"--","summary":"Very laggy panning and zooming of map on Orbis website","keywords":["perf:animation","perf:responsiveness","reproducible"],"severity":"S3"},{"op_sys":"Unspecified","creation_time":"2015-05-07T18:46:57Z","component":"JavaScript: GC","id":1162665,"status":"NEW","last_change_time":"2025-03-12T05:36:53Z","severity":"S3","summary":"ES6 Map performance for large numbers of elements is deficient","priority":"--","keywords":[]},{"last_change_time":"2023-02-19T05:13:03Z","status":"NEW","id":1213513,"component":"DOM: Animation","creation_time":"2015-10-10T00:31:34Z","op_sys":"Unspecified","keywords":["perf:responsiveness"],"summary":"2D canvas+HTML/CSS animation demo site broken on Firefox, works great on Chrome","priority":"--","severity":"S3"},{"summary":"On/Off opacity changes shouldn't create active layers","priority":"--","keywords":[],"severity":"S3","status":"NEW","last_change_time":"2024-09-22T12:08:26Z","id":1217748,"creation_time":"2015-10-23T09:20:20Z","component":"Layout","op_sys":"All"},{"op_sys":"Unspecified","creation_time":"2015-11-05T17:44:28Z","component":"JavaScript Engine","id":1222086,"status":"NEW","last_change_time":"2022-10-11T17:46:56Z","severity":"S3","summary":"Block JavaScript parser thread when source code characters are not available","priority":"--","keywords":["perf"]},{"severity":"S3","priority":"P3","summary":"Low performance of texImage2D with canvas2d and WebGL","keywords":["perf","regression","testcase"],"id":1246410,"status":"NEW","last_change_time":"2025-04-05T10:12:20Z","op_sys":"Unspecified","creation_time":"2016-02-06T17:43:25Z","component":"Graphics: CanvasWebGL"},{"severity":"S3","keywords":["perf:responsiveness","reproducible"],"summary":"Firefox hangs with 100% CPU usage when scrolling on specific page","priority":"--","op_sys":"Unspecified","component":"Graphics: WebRender","creation_time":"2016-03-18T17:34:07Z","id":1257910,"last_change_time":"2025-03-17T20:05:29Z","status":"NEW"},{"severity":"S3","priority":"--","summary":"Running jasmine is slower than Safari and Chrome","keywords":["perf"],"id":1265980,"status":"NEW","last_change_time":"2022-10-11T18:13:31Z","op_sys":"Unspecified","creation_time":"2016-04-20T07:12:37Z","component":"JavaScript 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parsing","priority":"P3","severity":"S3","component":"Layout","creation_time":"2016-08-12T05:51:58Z","op_sys":"Unspecified","status":"NEW","last_change_time":"2022-10-11T18:30:52Z","id":1294625},{"severity":"S3","keywords":["perf"],"priority":"P3","summary":"Measure and solve sync reflow for studying gdoc performance.","id":1296161,"last_change_time":"2022-10-11T18:31:41Z","status":"NEW","op_sys":"Unspecified","component":"Layout","creation_time":"2016-08-18T03:04:45Z"},{"keywords":["perf"],"summary":"If you set a high Polling Rate USB port of the mouse (1000 Hz), there will be noticeable performance issues while moving tabs","priority":"--","severity":"S3","component":"Widget: Win32","creation_time":"2016-10-01T23:51:50Z","op_sys":"Windows 7","status":"NEW","last_change_time":"2026-02-17T17:22:57Z","id":1306925},{"severity":"S3","priority":"--","summary":"[Perf] [google docs] Firefox will get 3~9% faster when running gdoc test cases with chrome user 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files is awful","id":1320534,"status":"NEW","last_change_time":"2025-03-11T08:30:57Z","op_sys":"All","component":"Bookmarks & History","creation_time":"2016-11-27T11:13:21Z"},{"summary":"DisplayList building shows signs of poor CPU usage","priority":"P3","keywords":["perf:resource-use"],"severity":"S3","status":"NEW","last_change_time":"2025-03-11T07:51:38Z","id":1330187,"creation_time":"2017-01-11T03:23:20Z","component":"Layout","op_sys":"Unspecified"},{"severity":"S3","keywords":["perf:resource-use"],"priority":"P3","summary":"Explore using the presshell arena for FramePropertyTable","op_sys":"Unspecified","component":"Layout","creation_time":"2017-01-12T08:37:41Z","id":1330558,"status":"NEW","last_change_time":"2022-10-11T18:55:13Z"},{"keywords":["hang","perf"],"summary":"PCompositorBridge::Msg_WillClose can block the UI thread when closing a window","priority":"P3","severity":"S3","component":"Graphics: Layers","creation_time":"2017-01-27T21:15:19Z","op_sys":"Unspecified","status":"NEW","last_change_time":"2022-10-11T18:58:09Z","id":1334655},{"summary":"Slow performance at drawing rectangles on Google Slides","priority":"P3","keywords":["perf"],"severity":"S3","creation_time":"2017-02-22T22:05:51Z","component":"Graphics","op_sys":"Unspecified","last_change_time":"2022-10-11T19:02:26Z","status":"NEW","id":1341882},{"last_change_time":"2022-03-02T15:55:52Z","status":"NEW","id":1342632,"component":"Networking: HTTP","creation_time":"2017-02-25T04:45:01Z","op_sys":"Unspecified","keywords":["perf"],"priority":"P3","summary":"Speed up PHttpChannelConstructor and consider streaming HttpChannelOpenArgs","severity":"S3"},{"last_change_time":"2022-10-11T19:03:23Z","status":"NEW","id":1343383,"component":"Graphics: Layers","creation_time":"2017-02-28T23:07:56Z","op_sys":"Unspecified","keywords":["perf"],"summary":"nsIDOMWindowUtils::StartFrameTimeRecording should not use sync IPC","priority":"P3","severity":"S3"},{"id":1343538,"status":"NEW","last_change_time":"2024-11-22T02:22:00Z","op_sys":"Unspecified","component":"Web Painting","creation_time":"2017-03-01T15:26:14Z","severity":"S3","keywords":["perf","perf:responsiveness"],"summary":"Overpainting on Google docs","priority":"--"},{"severity":"S3","keywords":["perf"],"priority":"P3","summary":"Consider compiling Ion IC code less eagerly","op_sys":"All","component":"JavaScript Engine: JIT","creation_time":"2017-03-10T12:17:59Z","id":1346178,"status":"NEW","last_change_time":"2025-04-30T01:31:39Z"},{"op_sys":"Unspecified","creation_time":"2017-03-13T20:32:12Z","component":"WebVR","id":1346927,"status":"NEW","last_change_time":"2022-10-11T19:05:40Z","severity":"S3","summary":"Replace PVRManager::GetSensorState with lock-free shared memory structure (Eliminating message queue IPC)","priority":"--","keywords":["perf"]},{"keywords":["perf"],"priority":"P5","summary":"Consider storing hints during syntax parse","severity":"S3","component":"JavaScript Engine","creation_time":"2017-03-16T09:28:24Z","op_sys":"Unspecified","status":"NEW","last_change_time":"2022-10-11T19:06:12Z","id":1347861},{"severity":"S3","priority":"--","summary":"Optimize away OverflowAreasProperty more often","keywords":["perf"],"id":1348697,"last_change_time":"2023-11-27T10:28:31Z","status":"NEW","op_sys":"All","creation_time":"2017-03-19T22:26:30Z","component":"Layout"},{"severity":"S3","keywords":["perf"],"summary":"Improve performance of megamorphic stubs","priority":"P3","op_sys":"All","component":"JavaScript Engine: JIT","creation_time":"2017-03-21T09:28:43Z","id":1349148,"last_change_time":"2024-04-24T02:40:50Z","status":"NEW"},{"id":1350367,"status":"NEW","last_change_time":"2022-10-11T19:08:05Z","op_sys":"Unspecified","creation_time":"2017-03-24T15:40:46Z","component":"DOM: Service Workers","severity":"S3","priority":"P3","summary":"Make service worker ScriptLoader paths use cached js bytecode from cache API","keywords":["perf"]},{"severity":"S3","keywords":["perf:frontend"],"priority":"--","summary":"Avoid full session history collect for DOMTitleChanged/OnHistoryReload","op_sys":"Unspecified","component":"Session Restore","creation_time":"2017-03-25T15:19:03Z","id":1350569,"last_change_time":"2023-07-19T04:57:18Z","status":"NEW"},{"severity":"S3","summary":"Bad performance on Sony Horizon game page","priority":"P3","keywords":["perf"],"op_sys":"Unspecified","creation_time":"2017-03-25T21:49:47Z","component":"Audio/Video: Playback","id":1350618,"status":"NEW","last_change_time":"2022-10-11T19:08:17Z"},{"op_sys":"Unspecified","component":"General","creation_time":"2017-03-26T21:54:08Z","id":1350749,"status":"NEW","last_change_time":"2022-10-11T19:08:21Z","severity":"S3","keywords":["perf"],"priority":"--","summary":"Add some instrumentation to find commonly added preference observers"},{"severity":"--","keywords":["nightly-community","perf","perf:resource-use","power"],"priority":"--","summary":"Provide \"Slight/Light/Low power/Battery saving/Battery saver\" mode option","op_sys":"All","component":"Performance: General","creation_time":"2017-03-29T17:44:37Z","id":1351755,"last_change_time":"2025-03-11T08:37:03Z","status":"NEW"},{"id":1351789,"last_change_time":"2025-04-27T11:43:06Z","status":"NEW","op_sys":"Unspecified","creation_time":"2017-03-29T18:30:44Z","component":"JavaScript: GC","severity":"S3","summary":"Add Telemetry probes for measuring garbage volume per GC","priority":"P3","keywords":["perf"]},{"severity":"S3","keywords":["perf"],"summary":"Consider faster alternatives to PLDHashTable in hot Layout code paths","priority":"--","id":1351829,"last_change_time":"2022-10-11T19:09:06Z","status":"NEW","op_sys":"All","component":"Layout","creation_time":"2017-03-29T20:02:58Z"},{"keywords":["perf"],"priority":"--","summary":"Consider adding StyleDisplay() values to nsIFrame","severity":"S3","last_change_time":"2025-05-05T12:26:28Z","status":"NEW","id":1351830,"component":"Layout","creation_time":"2017-03-29T20:09:00Z","op_sys":"All"},{"keywords":["perf","perf:resource-use"],"priority":"P2","summary":"Avoid running the refresh driver when the page is in background","severity":"--","last_change_time":"2022-11-02T13:08:34Z","status":"NEW","id":1352205,"component":"Layout","creation_time":"2017-03-30T20:21:31Z","op_sys":"Unspecified"},{"op_sys":"Unspecified","creation_time":"2017-03-31T19:02:50Z","component":"JavaScript: GC","id":1352524,"status":"NEW","last_change_time":"2025-05-06T16:14:08Z","severity":"S3","summary":"[meta] Improve GC scheduling","priority":"P3","keywords":["meta","perf"]},{"last_change_time":"2025-02-10T18:11:27Z","status":"NEW","id":1353384,"component":"JavaScript Engine: JIT","creation_time":"2017-04-04T14:54:51Z","op_sys":"All","keywords":["perf"],"priority":"P3","summary":"Optimize GetName 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