{"action":"closed","issue":{"url":"https://api.github.com/repos/hhvm/hack-hhvm-docs/issues/527","labels_url":"https://api.github.com/repos/hhvm/hack-hhvm-docs/issues/527/labels{/name}","comments_url":"https://api.github.com/repos/hhvm/hack-hhvm-docs/issues/527/comments","events_url":"https://api.github.com/repos/hhvm/hack-hhvm-docs/issues/527/events","html_url":"https://github.com/hhvm/hack-hhvm-docs/issues/527","id":65010805,"number":527,"title":"Scrolling is really slow","user":{"login":"strager","id":48666,"avatar_url":"https://avatars.githubusercontent.com/u/48666?v=3","gravatar_id":"","url":"https://api.github.com/users/strager","html_url":"https://github.com/strager","followers_url":"https://api.github.com/users/strager/followers","following_url":"https://api.github.com/users/strager/following{/other_user}","gists_url":"https://api.github.com/users/strager/gists{/gist_id}","starred_url":"https://api.github.com/users/strager/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/strager/subscriptions","organizations_url":"https://api.github.com/users/strager/orgs","repos_url":"https://api.github.com/users/strager/repos","events_url":"https://api.github.com/users/strager/events{/privacy}","received_events_url":"https://api.github.com/users/strager/received_events","type":"User","site_admin":false},"labels":[{"url":"https://api.github.com/repos/hhvm/hack-hhvm-docs/labels/wontfix","name":"wontfix","color":"fad8c7"}],"state":"closed","locked":false,"assignee":null,"milestone":null,"comments":1,"created_at":"2015-03-29T01:37:23Z","updated_at":"2015-08-14T02:43:01Z","closed_at":"2015-08-14T02:43:01Z","body":"Scrolling this page is really slow/laggy on my MacBook Pro: http://docs.hhvm.com/manual/en/hack.arrays.php\r\n\r\nAccording to Firefox' performance tools, paints are taking ~220ms and the frame rate is ~4FPS. There also seems to be some JS activity for every paint which looks tied to a scroll event.\r\n\r\nBrowser information:\r\n\r\n```\r\nApplication Basics\r\n------------------\r\n\r\nName: Firefox\r\nVersion: 39.0a1\r\nBuild ID: 20150327030212\r\nUpdate Channel: nightly\r\nUser Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.8; rv:39.0) Gecko/20100101 Firefox/39.0\r\nMultiprocess Windows: 1/1 (default: true)\r\n\r\nCrash Reports for the Last 3 Days\r\n---------------------------------\r\n\r\nAll Crash Reports\r\n\r\nExtensions\r\n----------\r\n\r\nName: YSlow\r\nVersion: 3.1.8\r\nEnabled: false\r\nID: yslow@yahoo-inc.com\r\n\r\nGraphics\r\n--------\r\n\r\nAsynchronous Pan/Zoom: none\r\nDevice ID: 0x fd5\r\nGPU Accelerated Windows: 1/1 OpenGL (OMTC)\r\nVendor ID: 0x10de\r\nWebGL Renderer: NVIDIA Corporation -- NVIDIA GeForce GT 650M OpenGL Engine\r\nwindowLayerManagerRemote: true\r\nAzureCanvasBackend: quartz\r\nAzureContentBackend: quartz\r\nAzureFallbackCanvasBackend: none\r\nAzureSkiaAccelerated: 0\r\n\r\nImportant Modified Preferences\r\n------------------------------\r\n\r\naccessibility.typeaheadfind.flashBar: 0\r\nbrowser.cache.disk.capacity: 358400\r\nbrowser.cache.disk.filesystem_reported: 1\r\nbrowser.cache.disk.smart_size_cached_value: 358400\r\nbrowser.cache.disk.smart_size.first_run: false\r\nbrowser.cache.disk.smart_size.use_old_max: false\r\nbrowser.cache.frecency_experiment: 4\r\nbrowser.download.importedFromSqlite: true\r\nbrowser.places.smartBookmarksVersion: 7\r\nbrowser.sessionstore.upgradeBackup.latestBuildID: 20150327030212\r\nbrowser.startup.homepage_override.buildID: 20150327030212\r\nbrowser.startup.homepage_override.mstone: 39.0a1\r\ndom.mozApps.used: true\r\nextensions.lastAppVersion: 39.0a1\r\ngfx.blacklist.webgl.msaa: 4\r\nmedia.gmp-gmpopenh264.lastUpdate: 1422602035\r\nmedia.gmp-gmpopenh264.version: 1.3\r\nmedia.gmp-manager.buildID: 20150327030212\r\nmedia.gmp-manager.lastCheck: 1427590290\r\nnetwork.cookie.prefsMigrated: true\r\nnetwork.predictor.cleaned-up: true\r\nplaces.database.lastMaintenance: 1427561607\r\nplaces.history.expiration.transient_current_max_pages: 104858\r\nplugin.disable_full_page_plugin_for_types: application/pdf\r\nplugin.importedState: true\r\nplugin.state.adobeaamdetect: 0\r\nplugin.state.glimsadditions: 0\r\nplugin.state.googletalkbrowserplugin: 0\r\nplugin.state.o1dbrowserplugin: 0\r\nplugin.state.quicktime plugin: 0\r\nplugin.state.sharepointbrowserplugin: 0\r\nprivacy.sanitize.migrateFx3Prefs: true\r\nstorage.vacuum.last.index: 0\r\nstorage.vacuum.last.places.sqlite: 1427503940\r\n\r\nImportant Locked Preferences\r\n----------------------------\r\n\r\nJavaScript\r\n----------\r\n\r\nIncremental GC: true\r\n\r\nAccessibility\r\n-------------\r\n\r\nActivated: false\r\nPrevent Accessibility: 0\r\n\r\nLibrary Versions\r\n----------------\r\n\r\nNSPR\r\nExpected minimum version: 4.10.8\r\nVersion in use: 4.10.8\r\n\r\nNSS\r\nExpected minimum version: 3.18 Basic ECC\r\nVersion in use: 3.18 Basic ECC\r\n\r\nNSSSMIME\r\nExpected minimum version: 3.18 Basic ECC\r\nVersion in use: 3.18 Basic ECC\r\n\r\nNSSSSL\r\nExpected minimum version: 3.18 Basic ECC\r\nVersion in use: 3.18 Basic ECC\r\n\r\nNSSUTIL\r\nExpected minimum version: 3.18\r\nVersion in use: 3.18\r\n\r\nExperimental Features\r\n---------------------\r\n```"}}