{"action":"closed","issue":{"url":"https://api.github.com/repos/phetsims/color-vision/issues/78","labels_url":"https://api.github.com/repos/phetsims/color-vision/issues/78/labels{/name}","comments_url":"https://api.github.com/repos/phetsims/color-vision/issues/78/comments","events_url":"https://api.github.com/repos/phetsims/color-vision/issues/78/events","html_url":"https://github.com/phetsims/color-vision/issues/78","id":41452824,"number":78,"title":"Slow performance and poor rendering on IE9","user":{"login":"bryo5363","id":7717368,"avatar_url":"https://avatars.githubusercontent.com/u/7717368?v=3","gravatar_id":"","url":"https://api.github.com/users/bryo5363","html_url":"https://github.com/bryo5363","followers_url":"https://api.github.com/users/bryo5363/followers","following_url":"https://api.github.com/users/bryo5363/following{/other_user}","gists_url":"https://api.github.com/users/bryo5363/gists{/gist_id}","starred_url":"https://api.github.com/users/bryo5363/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/bryo5363/subscriptions","organizations_url":"https://api.github.com/users/bryo5363/orgs","repos_url":"https://api.github.com/users/bryo5363/repos","events_url":"https://api.github.com/users/bryo5363/events{/privacy}","received_events_url":"https://api.github.com/users/bryo5363/received_events","type":"User","site_admin":false},"labels":[],"state":"closed","locked":false,"assignee":null,"milestone":null,"comments":6,"created_at":"2014-08-28T22:34:25Z","updated_at":"2015-04-24T00:13:51Z","closed_at":"2015-04-24T00:13:51Z","body":"Test device: MacBook Pro\r\n\r\n\r\nOperating System: Win 7 64-bit\r\n\r\n\r\nBrowser: IE 9 9.0.8112.16421\r\n\r\n\r\nProblem description: Performance is quite slow on IE9; rendering of the observer is quite poor\r\n\r\n\r\nSteps to reproduce:\r\n-open RGB\r\n-Access all sliders. Sim will run slow\r\n\r\nSeverity:\r\n\r\n\r\nScreenshots:\r\n![screen shot 2014-08-28 at 4 31 45 pm](https://cloud.githubusercontent.com/assets/7717368/4084045/6dc5fd5c-2f03-11e4-8534-d7ba04ed65f1.png)\r\n\r\n\r\nTroubleshooting information (do not edit):\r\n\r\nName: Color Vision\r\n\r\nURL: http://www.colorado.edu/physics/phet/dev/html/color-vision/1.0.0-rc.2/color-vision_en.html\r\n\r\nVersion: 1.0.0-rc.2\r\n\r\nFeatures missing: cssgradients, applicationcache, flexbox, cssanimations, csstransforms3d, applicationcache, history, webworkers, websockets, touch, webgl, fullscreen, raf, svgfilters, Float32Array, Float64Array\r\n\r\nUser Agent: Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; WOW64; Trident/5.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0)\r\n\r\nWindow: 1161x533\r\n\r\nPixel Ratio: 1/1\r\n\r\nWebGL: unsupported"}}