bugzilla-data-low.json

{"bugs":[{"last_change_time":"2025-04-24T15:29:17Z","severity":"S3","priority":"P3","status":"ASSIGNED","creation_time":"2017-02-22T23:15:05Z","op_sys":"Unspecified","summary":"Stop looking up GLContext symbols for every new window","component":"Graphics","id":1341913,"keywords":["perf"]},{"id":1522282,"summary":"Delayed image loading on low end ARM devices","component":"Performance: Navigation","keywords":["perf:pageload"],"status":"ASSIGNED","creation_time":"2019-01-23T21:52:44Z","op_sys":"Android","severity":"S3","priority":"P1","last_change_time":"2025-03-21T02:42:31Z"},{"id":1631949,"summary":"Investigate merging shader cache files","component":"Graphics","keywords":["perf:startup"],"op_sys":"Unspecified","creation_time":"2020-04-21T20:52:29Z","status":"ASSIGNED","severity":"S3","priority":"P3","last_change_time":"2022-10-12T00:08:45Z"},{"component":"Graphics: Text","id":2008619,"keywords":[],"summary":"Text shaping word cache adds a lot of overhead during Editor-TipTap","op_sys":"Unspecified","creation_time":"2026-01-05T20:54:42Z","status":"ASSIGNED","severity":"S4","priority":"--","last_change_time":"2026-02-03T20:36:38Z"},{"id":486378,"keywords":["blocked-ux","perf"],"component":"Bookmarks & History","summary":"Poor performance using bookmarks menu with large amounts of bookmarks.","status":"NEW","creation_time":"2009-04-01T20:00:41Z","op_sys":"Windows Vista","priority":"P3","severity":"S3","last_change_time":"2023-05-16T02:23:47Z"},{"creation_time":"2009-04-29T22:35:30Z","status":"NEW","op_sys":"All","id":490714,"component":"Places","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","priority":"P3","severity":"N/A"},{"last_change_time":"2022-10-10T22:59:55Z","priority":"--","severity":"S3","status":"NEW","creation_time":"2010-06-29T14:36:04Z","op_sys":"All","component":"Layout: Columns","summary":"{inc} Resizing window is slow for long list with multicol (from \"-moz-column-count: 3\" or \"column-width: 20em;\")","id":575614,"keywords":["perf","perf:responsiveness","testcase"]},{"priority":"--","severity":"S3","last_change_time":"2025-03-11T08:46:07Z","id":613498,"summary":"Very slow chrome to content DOM access","keywords":["perf","perf:pageload"],"component":"XPConnect","creation_time":"2010-11-19T15:34:28Z","status":"NEW","op_sys":"macOS"},{"status":"NEW","creation_time":"2011-03-31T18:37:55Z","op_sys":"Linux","summary":"throttle animation in completely obscured windows (virtual desktop, minimised, hidden behind other fullscreened windows)","component":"Widget","keywords":["perf","perf:resource-use"],"id":646937,"last_change_time":"2022-10-10T23:24:13Z","priority":"P3","severity":"S3"},{"severity":"S3","priority":"P3","last_change_time":"2025-09-29T14:01:38Z","summary":"Repeated calls to location.hash = \"#foo\" cause large amounts of disk activity","keywords":["perf","perf:responsiveness"],"id":661590,"component":"Places","op_sys":"All","status":"NEW","creation_time":"2011-06-02T18:09:59Z"},{"severity":"S3","priority":"--","last_change_time":"2024-04-08T16:58:41Z","summary":"Compositing/present still hapens when the only changing parts are out of the viewport","id":711924,"component":"Graphics: WebRender","keywords":["perf","perf:resource-use"],"status":"NEW","creation_time":"2011-12-19T09:05:20Z","op_sys":"All"},{"priority":"--","severity":"S3","last_change_time":"2024-04-05T11:37:58Z","component":"Graphics: Canvas2D","id":760888,"summary":"IE10 Test Drive: ParticleAcceleration Canvas 2D demo is slow","keywords":["perf"],"op_sys":"All","creation_time":"2012-06-03T03:18:54Z","status":"NEW"},{"last_change_time":"2023-06-05T16:31:57Z","priority":"P3","severity":"S3","creation_time":"2012-10-19T21:25:22Z","status":"NEW","op_sys":"All","id":803709,"keywords":["perf:resource-use"],"summary":"We appear to be copying large data URIs over and over in nsSimpleURI.","component":"Networking"},{"component":"PDF Viewer","summary":"Processing http://lib.tkk.fi/Dipl/2002/urn007413.pdf is slow, and its text layer is all messed up","id":810214,"keywords":["perf:responsiveness"],"status":"NEW","creation_time":"2012-11-09T08:29:30Z","op_sys":"Linux","priority":"P3","severity":"S3","last_change_time":"2025-03-31T14:05:54Z"},{"id":821693,"keywords":["perf","perf:responsiveness"],"component":"CSS Parsing and Computation","summary":"janky Scrolling on smartsheet.com Sheets","op_sys":"Windows 7","creation_time":"2012-12-14T13:46:12Z","status":"NEW","priority":"--","severity":"S3","last_change_time":"2023-03-01T12:04:23Z"},{"op_sys":"Windows 7","status":"NEW","creation_time":"2013-01-07T19:06:03Z","component":"Graphics: ImageLib","summary":"nsIconChannel::AsyncOpen can block","keywords":["perf"],"id":827440,"last_change_time":"2022-11-24T06:34:31Z","severity":"S3","priority":"--"},{"op_sys":"Windows 8","creation_time":"2013-01-08T19:17:33Z","status":"NEW","summary":"Opening huge mercurial long commit page freezing Firefox","component":"Layout","keywords":["perf"],"id":827937,"last_change_time":"2022-10-29T12:12:42Z","priority":"--","severity":"S3"},{"id":830504,"summary":"Firefox should abort on tryserver when executing SQL on the main thread","component":"SQLite and Embedded Database Bindings","keywords":["perf:frontend","perf:responsiveness"],"creation_time":"2013-01-14T22:07:19Z","status":"NEW","op_sys":"All","severity":"S3","priority":"P3","last_change_time":"2024-08-20T19:28:43Z"},{"severity":"S3","priority":"--","last_change_time":"2023-05-16T02:22:53Z","summary":"Use IOUtils for 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while","component":"Layout","keywords":["perf"],"last_change_time":"2023-07-27T07:06:57Z","severity":"S3","priority":"--"},{"last_change_time":"2022-10-11T01:07:35Z","priority":"--","severity":"S3","creation_time":"2013-09-17T02:34:03Z","status":"NEW","op_sys":"All","summary":"Visibility state is not updated when the browser window is obscured or on another workspace","component":"General","id":917090,"keywords":["perf:resource-use"]},{"priority":"--","severity":"S3","last_change_time":"2025-12-02T04:57:52Z","summary":"Optimize GetRootPresContext() to avoid going through the viewmanager / view tree","id":984690,"component":"Layout","keywords":["perf"],"op_sys":"Linux","creation_time":"2014-03-18T00:14:52Z","status":"NEW"},{"op_sys":"All","status":"NEW","creation_time":"2014-06-10T10:02:00Z","summary":"Preload panel contents on hover of toolbar button","id":1023152,"component":"Toolbars and 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GC","id":1162665,"keywords":[],"op_sys":"Unspecified","creation_time":"2015-05-07T18:46:57Z","status":"NEW","priority":"--","severity":"S3","last_change_time":"2025-03-12T05:36:53Z"},{"op_sys":"Unspecified","creation_time":"2015-10-10T00:31:34Z","status":"NEW","id":1213513,"summary":"2D canvas+HTML/CSS animation demo site broken on Firefox, works great on Chrome","component":"DOM: Animation","keywords":["perf:responsiveness"],"last_change_time":"2023-02-19T05:13:03Z","priority":"--","severity":"S3"},{"priority":"--","severity":"S3","last_change_time":"2024-09-22T12:08:26Z","summary":"On/Off opacity changes shouldn't create active layers","id":1217748,"component":"Layout","keywords":[],"op_sys":"All","status":"NEW","creation_time":"2015-10-23T09:20:20Z"},{"summary":"Block JavaScript parser thread when source code characters are not available","id":1222086,"keywords":["perf"],"component":"JavaScript 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Chrome","op_sys":"Unspecified","creation_time":"2016-04-20T07:12:37Z","status":"NEW"},{"summary":"CanvasRenderingContext2D::DrawImage takes lots of  time when scrolling Google Spreadsheet","id":1278554,"component":"Graphics: Canvas2D","keywords":["perf"],"op_sys":"Unspecified","status":"NEW","creation_time":"2016-06-07T13:45:20Z","priority":"--","severity":"S3","last_change_time":"2022-11-08T00:01:53Z"},{"creation_time":"2016-06-19T13:43:03Z","status":"NEW","op_sys":"Unspecified","summary":"Angular framework performance test spends 10% in nursery GC","component":"JavaScript: GC","id":1280802,"keywords":["perf"],"last_change_time":"2024-08-11T09:37:57Z","priority":"P3","severity":"S3"},{"last_change_time":"2022-12-08T15:45:06Z","severity":"S3","priority":"P3","creation_time":"2016-06-29T13:06:59Z","status":"NEW","op_sys":"Linux","id":1283089,"summary":"Firefox 40+ are very sluggish through x2go","component":"Graphics","keywords":["perf:responsiveness","regression"]},{"id":1294625,"component":"Layout","summary":"Try to tick refresh driver during html parsing","keywords":["perf"],"status":"NEW","creation_time":"2016-08-12T05:51:58Z","op_sys":"Unspecified","severity":"S3","priority":"P3","last_change_time":"2022-10-11T18:30:52Z"},{"summary":"Measure and solve sync reflow for studying gdoc performance.","component":"Layout","id":1296161,"keywords":["perf"],"status":"NEW","creation_time":"2016-08-18T03:04:45Z","op_sys":"Unspecified","priority":"P3","severity":"S3","last_change_time":"2022-10-11T18:31:41Z"},{"id":1306925,"summary":"If you set a high Polling Rate USB port of the mouse (1000 Hz), there will be noticeable performance issues while moving tabs","keywords":["perf"],"component":"Widget: Win32","status":"NEW","creation_time":"2016-10-01T23:51:50Z","op_sys":"Windows 7","priority":"--","severity":"S3","last_change_time":"2026-02-17T17:22:57Z"},{"op_sys":"Linux","status":"NEW","creation_time":"2016-10-03T03:00:35Z","summary":"[Perf] [google docs] Firefox will get 3~9% faster when running gdoc test cases with chrome user agent","component":"General","id":1307024,"keywords":["perf"],"last_change_time":"2024-08-14T04:57:13Z","priority":"--","severity":"S3"},{"op_sys":"Unspecified","status":"NEW","creation_time":"2016-10-08T00:18:22Z","keywords":["perf","perf:responsiveness"],"summary":"for background tabs, break refresh driver tick into multiple events off the main thread's event loop","component":"Layout","id":1308660,"last_change_time":"2025-04-16T19:29:34Z","priority":"--","severity":"--"},{"keywords":["perf"],"id":1316864,"summary":"Google Apps extremely slow -- scrolling, updating text, etc -- unusable","component":"JavaScript Engine","op_sys":"Windows 10","status":"NEW","creation_time":"2016-11-11T14:41:11Z","severity":"S3","priority":"P5","last_change_time":"2022-10-11T18:44:06Z"},{"id":1320534,"summary":"[meta] Speed and performance of importing bookmarks from JSON or HTML files is awful","keywords":["hang","meta","nightly-community","perf:frontend"],"component":"Bookmarks & History","creation_time":"2016-11-27T11:13:21Z","status":"NEW","op_sys":"All","priority":"P5","severity":"--","last_change_time":"2025-03-11T08:30:57Z"},{"severity":"S3","priority":"P3","last_change_time":"2025-03-11T07:51:38Z","component":"Layout","id":1330187,"summary":"DisplayList building shows signs of poor CPU usage","keywords":["perf:resource-use"],"op_sys":"Unspecified","status":"NEW","creation_time":"2017-01-11T03:23:20Z"},{"op_sys":"Unspecified","status":"NEW","creation_time":"2017-01-12T08:37:41Z","summary":"Explore using the presshell arena for FramePropertyTable","id":1330558,"component":"Layout","keywords":["perf:resource-use"],"last_change_time":"2022-10-11T18:55:13Z","priority":"P3","severity":"S3"},{"severity":"S3","priority":"P3","last_change_time":"2022-10-11T18:58:09Z","component":"Graphics: Layers","id":1334655,"summary":"PCompositorBridge::Msg_WillClose can block the UI thread when closing a window","keywords":["hang","perf"],"op_sys":"Unspecified","creation_time":"2017-01-27T21:15:19Z","status":"NEW"},{"priority":"P3","severity":"S3","last_change_time":"2022-10-11T19:02:26Z","component":"Graphics","id":1341882,"summary":"Slow performance at drawing rectangles on Google Slides","keywords":["perf"],"status":"NEW","creation_time":"2017-02-22T22:05:51Z","op_sys":"Unspecified"},{"component":"Networking: HTTP","id":1342632,"summary":"Speed up PHttpChannelConstructor and consider streaming HttpChannelOpenArgs","keywords":["perf"],"op_sys":"Unspecified","status":"NEW","creation_time":"2017-02-25T04:45:01Z","severity":"S3","priority":"P3","last_change_time":"2022-03-02T15:55:52Z"},{"op_sys":"Unspecified","status":"NEW","creation_time":"2017-02-28T23:07:56Z","component":"Graphics: Layers","summary":"nsIDOMWindowUtils::StartFrameTimeRecording should not use sync IPC","id":1343383,"keywords":["perf"],"last_change_time":"2022-10-11T19:03:23Z","priority":"P3","severity":"S3"},{"creation_time":"2017-03-01T15:26:14Z","status":"NEW","op_sys":"Unspecified","component":"Web Painting","id":1343538,"keywords":["perf","perf:responsiveness"],"summary":"Overpainting on Google docs","last_change_time":"2024-11-22T02:22:00Z","priority":"--","severity":"S3"},{"status":"NEW","creation_time":"2017-03-10T12:17:59Z","op_sys":"All","id":1346178,"keywords":["perf"],"summary":"Consider compiling Ion IC code less eagerly","component":"JavaScript Engine: JIT","last_change_time":"2025-04-30T01:31:39Z","severity":"S3","priority":"P3"},{"component":"WebVR","id":1346927,"summary":"Replace PVRManager::GetSensorState with lock-free shared memory structure (Eliminating message queue IPC)","keywords":["perf"],"creation_time":"2017-03-13T20:32:12Z","status":"NEW","op_sys":"Unspecified","priority":"--","severity":"S3","last_change_time":"2022-10-11T19:05:40Z"},{"op_sys":"Unspecified","status":"NEW","creation_time":"2017-03-16T09:28:24Z","component":"JavaScript Engine","id":1347861,"summary":"Consider storing hints during syntax parse","keywords":["perf"],"last_change_time":"2022-10-11T19:06:12Z","priority":"P5","severity":"S3"},{"last_change_time":"2023-11-27T10:28:31Z","priority":"--","severity":"S3","status":"NEW","creation_time":"2017-03-19T22:26:30Z","op_sys":"All","summary":"Optimize away OverflowAreasProperty more 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nsIFrame","id":1351830,"keywords":["perf"],"component":"Layout","last_change_time":"2025-05-05T12:26:28Z","severity":"S3","priority":"--"},{"summary":"Avoid running the refresh driver when the page is in background","component":"Layout","id":1352205,"keywords":["perf","perf:resource-use"],"op_sys":"Unspecified","status":"NEW","creation_time":"2017-03-30T20:21:31Z","priority":"P2","severity":"--","last_change_time":"2022-11-02T13:08:34Z"},{"op_sys":"Unspecified","status":"NEW","creation_time":"2017-03-31T19:02:50Z","id":1352524,"summary":"[meta] Improve GC scheduling","keywords":["meta","perf"],"component":"JavaScript: GC","last_change_time":"2025-05-06T16:14:08Z","priority":"P3","severity":"S3"},{"priority":"P3","severity":"S3","last_change_time":"2025-02-10T18:11:27Z","id":1353384,"component":"JavaScript Engine: JIT","summary":"Optimize GetName 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shutdown","component":"General","keywords":["perf:frontend"],"creation_time":"2017-04-11T13:07:05Z","status":"NEW","op_sys":"Unspecified","priority":"P4","severity":"S3","last_change_time":"2023-05-16T02:22:12Z"},{"last_change_time":"2022-10-11T19:11:35Z","severity":"S3","priority":"P3","creation_time":"2017-04-11T13:26:24Z","status":"NEW","op_sys":"macOS","summary":"Activating the browser window is janky","id":1355466,"component":"Widget: Cocoa","keywords":["perf","perf:responsiveness"]},{"keywords":["perf:frontend","perf:responsiveness"],"id":1356532,"component":"Autocomplete","summary":"Try avoiding layout flushes in autocomplete::_handleOverflow","op_sys":"Unspecified","creation_time":"2017-04-14T09:29:21Z","status":"NEW","priority":"P3","severity":"S3","last_change_time":"2024-03-22T08:25:52Z"},{"priority":"P3","severity":"S3","last_change_time":"2022-10-11T19:12:20Z","summary":"Rewrite AppConstants.jsm in 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