bugzilla-data-low.json

{"bugs":[{"keywords":["perf"],"summary":"Stop looking up GLContext symbols for every new window","last_change_time":"2025-04-24T15:29:17Z","severity":"S3","priority":"P3","status":"ASSIGNED","component":"Graphics","creation_time":"2017-02-22T23:15:05Z","op_sys":"Unspecified","id":1341913},{"id":1522282,"op_sys":"Android","component":"Performance: Navigation","status":"ASSIGNED","creation_time":"2019-01-23T21:52:44Z","priority":"P1","severity":"S3","keywords":["perf:pageload"],"summary":"Delayed image loading on low end ARM devices","last_change_time":"2025-03-21T02:42:31Z"},{"last_change_time":"2022-10-12T00:08:45Z","summary":"Investigate merging shader cache files","keywords":["perf:startup"],"priority":"P3","severity":"S3","op_sys":"Unspecified","creation_time":"2020-04-21T20:52:29Z","status":"ASSIGNED","component":"Graphics","id":1631949},{"id":2008619,"op_sys":"Unspecified","creation_time":"2026-01-05T20:54:42Z","status":"ASSIGNED","component":"Graphics: Text","priority":"--","severity":"S2","last_change_time":"2026-07-21T18:25:48Z","summary":"[meta] Text shaping word cache affects performance on several SP3 tests (particularly TipTap)","keywords":["meta"]},{"id":486378,"op_sys":"Windows Vista","status":"NEW","component":"Bookmarks & History","creation_time":"2009-04-01T20:00:41Z","priority":"P3","severity":"S3","summary":"Poor performance using bookmarks menu with large amounts of bookmarks.","keywords":["blocked-ux","perf"],"last_change_time":"2023-05-16T02:23:47Z"},{"id":490714,"op_sys":"All","status":"NEW","component":"Places","creation_time":"2009-04-29T22:35:30Z","priority":"P3","severity":"N/A","keywords":["main-thread-io","meta","perf","perf:frontend","perf:responsiveness"],"summary":"[meta] Implement an Asynchronous API for opening container query nodes","last_change_time":"2025-03-11T07:58:22Z"},{"op_sys":"All","status":"NEW","component":"Layout: Columns","creation_time":"2010-06-29T14:36:04Z","id":575614,"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"],"last_change_time":"2022-10-10T22:59:55Z","priority":"--","severity":"S3"},{"component":"XPConnect","status":"NEW","creation_time":"2010-11-19T15:34:28Z","op_sys":"macOS","id":613498,"summary":"Very slow chrome to content DOM access","keywords":["perf","perf:pageload"],"last_change_time":"2025-03-11T08:46:07Z","severity":"S3","priority":"--"},{"id":646937,"creation_time":"2011-03-31T18:37:55Z","component":"Widget","status":"NEW","op_sys":"Linux","severity":"S3","priority":"P3","last_change_time":"2022-10-10T23:24:13Z","summary":"throttle animation in completely obscured windows (virtual desktop, minimised, hidden behind other fullscreened windows)","keywords":["perf","perf:resource-use"]},{"priority":"P3","severity":"S3","keywords":["perf","perf:responsiveness"],"summary":"Repeated calls to location.hash = \"#foo\" cause large amounts of disk activity","last_change_time":"2025-09-29T14:01:38Z","id":661590,"op_sys":"All","status":"NEW","component":"Places","creation_time":"2011-06-02T18:09:59Z"},{"op_sys":"All","status":"NEW","component":"Graphics: WebRender","creation_time":"2011-12-19T09:05:20Z","id":711924,"keywords":["perf","perf:resource-use"],"summary":"Compositing/present still hapens when the only changing parts are out of the viewport","last_change_time":"2024-04-08T16:58:41Z","priority":"--","severity":"S3"},{"severity":"S3","priority":"--","summary":"IE10 Test Drive: ParticleAcceleration Canvas 2D demo is slow","keywords":["perf"],"last_change_time":"2024-04-05T11:37:58Z","id":760888,"component":"Graphics: Canvas2D","status":"NEW","creation_time":"2012-06-03T03:18:54Z","op_sys":"All"},{"priority":"P3","severity":"S3","keywords":["perf:resource-use"],"summary":"We appear to be copying large data URIs over and over in nsSimpleURI.","last_change_time":"2023-06-05T16:31:57Z","id":803709,"op_sys":"All","status":"NEW","component":"Networking","creation_time":"2012-10-19T21:25:22Z"},{"priority":"P3","severity":"S3","keywords":["perf:responsiveness"],"summary":"Processing http://lib.tkk.fi/Dipl/2002/urn007413.pdf is slow, and its text layer is all messed up","last_change_time":"2025-03-31T14:05:54Z","id":810214,"op_sys":"Linux","status":"NEW","component":"PDF Viewer","creation_time":"2012-11-09T08:29:30Z"},{"id":821693,"creation_time":"2012-12-14T13:46:12Z","status":"NEW","component":"CSS Parsing and Computation","op_sys":"Windows 7","severity":"S3","priority":"--","last_change_time":"2023-03-01T12:04:23Z","keywords":["perf","perf:responsiveness"],"summary":"janky Scrolling on smartsheet.com Sheets"},{"keywords":["perf"],"summary":"nsIconChannel::AsyncOpen can block","last_change_time":"2022-11-24T06:34:31Z","priority":"--","severity":"S3","op_sys":"Windows 7","component":"Graphics: ImageLib","status":"NEW","creation_time":"2013-01-07T19:06:03Z","id":827440},{"component":"Layout","status":"NEW","creation_time":"2013-01-08T19:17:33Z","op_sys":"Windows 8","id":827937,"keywords":["perf"],"summary":"Opening huge mercurial long commit page freezing Firefox","last_change_time":"2022-10-29T12:12:42Z","severity":"S3","priority":"--"},{"priority":"P3","severity":"S3","last_change_time":"2024-08-20T19:28:43Z","summary":"Firefox should abort on tryserver when executing SQL on the main thread","keywords":["perf:frontend","perf:responsiveness"],"id":830504,"op_sys":"All","creation_time":"2013-01-14T22:07:19Z","component":"SQLite and Embedded Database Bindings","status":"NEW"},{"component":"General","status":"NEW","creation_time":"2013-02-05T02:16:08Z","op_sys":"All","id":837989,"summary":"Use IOUtils for gLastOpenDirectory","keywords":["main-thread-io","perf:frontend"],"last_change_time":"2023-05-16T02:22:53Z","severity":"S3","priority":"--"},{"priority":"P3","severity":"S3","keywords":["main-thread-io","perf:responsiveness"],"summary":"nsFileChannel::nsFileChannel causes expensive lstats","last_change_time":"2024-03-27T16:10:09Z","id":862383,"op_sys":"macOS","status":"NEW","component":"Networking: File","creation_time":"2013-04-16T15:29:21Z"},{"last_change_time":"2024-04-01T16:26:36Z","summary":"nsIOService::NewFileURI is doing main thread IO and causes jank","keywords":["main-thread-io","perf","perf:frontend"],"priority":"P3","severity":"S3","op_sys":"All","creation_time":"2013-07-07T15:57:11Z","component":"Networking","status":"NEW","id":890712},{"last_change_time":"2023-07-27T07:06:57Z","keywords":["perf"],"summary":"Polygon.com page scrolling becomes extremely slow after a while","priority":"--","severity":"S3","op_sys":"All","creation_time":"2013-09-10T12:49:00Z","component":"Layout","status":"NEW","id":914595},{"severity":"S3","priority":"--","last_change_time":"2022-10-11T01:07:35Z","keywords":["perf:resource-use"],"summary":"Visibility state is not updated when the browser window is obscured or on another workspace","id":917090,"creation_time":"2013-09-17T02:34:03Z","status":"NEW","component":"General","op_sys":"All"},{"keywords":["perf"],"summary":"Optimize GetRootPresContext() to avoid going through the viewmanager / view tree","last_change_time":"2025-12-02T04:57:52Z","priority":"--","severity":"S3","op_sys":"Linux","status":"NEW","component":"Layout","creation_time":"2014-03-18T00:14:52Z","id":984690},{"severity":"S3","priority":"--","last_change_time":"2023-07-19T04:52:40Z","keywords":["perf:frontend"],"summary":"Preload panel contents on hover of toolbar button","id":1023152,"creation_time":"2014-06-10T10:02:00Z","status":"NEW","component":"Toolbars and Customization","op_sys":"All"},{"keywords":["perf:frontend"],"summary":"Make bookmarks toolbar view use async openContainer","last_change_time":"2026-05-29T15:38:01Z","severity":"S3","priority":"P3","component":"Places","status":"NEW","creation_time":"2014-08-02T09:50:40Z","op_sys":"All","id":1047817},{"id":1097376,"component":"JavaScript Engine","status":"NEW","creation_time":"2014-11-12T00:22:19Z","op_sys":"Android","severity":"S3","priority":"--","keywords":["perf"],"summary":"Poor performance in Ember app Discourse","last_change_time":"2022-10-11T15:57:30Z"},{"component":"Layout: Form Controls","status":"NEW","creation_time":"2015-01-06T01:55:10Z","op_sys":"All","id":1118086,"summary":"[e10s] There is a delay for about 1 seconds to display <select> drop-down list with 1600+ 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GC","status":"NEW","creation_time":"2015-05-07T18:46:57Z","op_sys":"Unspecified"},{"summary":"2D canvas+HTML/CSS animation demo site broken on Firefox, works great on Chrome","keywords":["perf:responsiveness"],"last_change_time":"2023-02-19T05:13:03Z","severity":"S3","priority":"--","component":"DOM: Animation","status":"NEW","creation_time":"2015-10-10T00:31:34Z","op_sys":"Unspecified","id":1213513},{"last_change_time":"2024-09-22T12:08:26Z","summary":"On/Off opacity changes shouldn't create active layers","keywords":[],"priority":"--","severity":"S3","op_sys":"All","creation_time":"2015-10-23T09:20:20Z","component":"Layout","status":"NEW","id":1217748},{"priority":"--","severity":"S3","keywords":["perf"],"summary":"Block JavaScript parser thread when source code characters are not available","last_change_time":"2022-10-11T17:46:56Z","id":1222086,"op_sys":"Unspecified","component":"JavaScript 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HttpChannelOpenArgs","keywords":["perf"],"last_change_time":"2022-03-02T15:55:52Z","priority":"P3","severity":"S3"},{"last_change_time":"2022-10-11T19:03:23Z","keywords":["perf"],"summary":"nsIDOMWindowUtils::StartFrameTimeRecording should not use sync IPC","priority":"P3","severity":"S3","op_sys":"Unspecified","creation_time":"2017-02-28T23:07:56Z","component":"Graphics: Layers","status":"NEW","id":1343383},{"priority":"--","severity":"S3","last_change_time":"2024-11-22T02:22:00Z","summary":"Overpainting on Google docs","keywords":["perf","perf:responsiveness"],"id":1343538,"op_sys":"Unspecified","creation_time":"2017-03-01T15:26:14Z","component":"Web Painting","status":"NEW"},{"summary":"Consider compiling Ion IC code less eagerly","keywords":["perf"],"last_change_time":"2025-04-30T01:31:39Z","priority":"P3","severity":"S3","op_sys":"All","component":"JavaScript Engine: JIT","status":"NEW","creation_time":"2017-03-10T12:17:59Z","id":1346178},{"component":"WebVR","status":"NEW","creation_time":"2017-03-13T20:32:12Z","op_sys":"Unspecified","id":1346927,"summary":"Replace PVRManager::GetSensorState with lock-free shared memory structure (Eliminating message queue IPC)","keywords":["perf"],"last_change_time":"2022-10-11T19:05:40Z","severity":"S3","priority":"--"},{"last_change_time":"2022-10-11T19:06:12Z","keywords":["perf"],"summary":"Consider storing hints during syntax parse","priority":"P5","severity":"S3","op_sys":"Unspecified","creation_time":"2017-03-16T09:28:24Z","component":"JavaScript Engine","status":"NEW","id":1347861},{"severity":"S3","priority":"--","last_change_time":"2023-11-27T10:28:31Z","keywords":["perf"],"summary":"Optimize away OverflowAreasProperty more 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nsIFrame","keywords":["perf"],"id":1351830,"op_sys":"All","creation_time":"2017-03-29T20:09:00Z","component":"Layout","status":"NEW"},{"op_sys":"Unspecified","creation_time":"2017-03-30T20:21:31Z","component":"Layout","status":"NEW","id":1352205,"last_change_time":"2022-11-02T13:08:34Z","summary":"Avoid running the refresh driver when the page is in background","keywords":["perf","perf:resource-use"],"priority":"P2","severity":"--"},{"op_sys":"Unspecified","creation_time":"2017-03-31T19:02:50Z","status":"NEW","component":"JavaScript: GC","id":1352524,"last_change_time":"2025-05-06T16:14:08Z","keywords":["meta","perf"],"summary":"[meta] Improve GC scheduling","priority":"P3","severity":"S3"},{"severity":"S3","priority":"P3","last_change_time":"2025-02-10T18:11:27Z","summary":"Optimize GetName TypeOfNoProperty","keywords":["perf"],"id":1353384,"creation_time":"2017-04-04T14:54:51Z","component":"JavaScript Engine: JIT","status":"NEW","op_sys":"All"},{"priority":"P3","severity":"S3","keywords":["perf"],"summary":"Initialize sandbox global properties lazily","last_change_time":"2022-10-11T19:11:14Z","id":1354945,"op_sys":"Unspecified","component":"XPConnect","status":"NEW","creation_time":"2017-04-09T22:09:43Z"},{"priority":"P3","severity":"S3","last_change_time":"2023-07-19T04:59:14Z","keywords":["perf","perf:frontend","perf:responsiveness"],"summary":"Investigate preparing the next tab on mousedown on the tab close button","id":1355456,"op_sys":"Unspecified","creation_time":"2017-04-11T13:02:53Z","status":"NEW","component":"Tabbed Browser"},{"id":1355459,"op_sys":"Unspecified","creation_time":"2017-04-11T13:07:05Z","component":"General","status":"NEW","priority":"P4","severity":"S3","last_change_time":"2023-05-16T02:22:12Z","keywords":["perf:frontend"],"summary":"The last window and the task bar item should disappear immediately on 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