{"action":"created","issue":{"url":"https://api.github.com/repos/dotnet/corefx/issues/29158","repository_url":"https://api.github.com/repos/dotnet/corefx","labels_url":"https://api.github.com/repos/dotnet/corefx/issues/29158/labels{/name}","comments_url":"https://api.github.com/repos/dotnet/corefx/issues/29158/comments","events_url":"https://api.github.com/repos/dotnet/corefx/issues/29158/events","html_url":"https://github.com/dotnet/corefx/issues/29158","id":315149257,"number":29158,"title":"About 30% performance regression for GetTypeCode() test","user":{"login":"maryamariyan","id":5897654,"avatar_url":"https://avatars2.githubusercontent.com/u/5897654?v=4","gravatar_id":"","url":"https://api.github.com/users/maryamariyan","html_url":"https://github.com/maryamariyan","followers_url":"https://api.github.com/users/maryamariyan/followers","following_url":"https://api.github.com/users/maryamariyan/following{/other_user}","gists_url":"https://api.github.com/users/maryamariyan/gists{/gist_id}","starred_url":"https://api.github.com/users/maryamariyan/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/maryamariyan/subscriptions","organizations_url":"https://api.github.com/users/maryamariyan/orgs","repos_url":"https://api.github.com/users/maryamariyan/repos","events_url":"https://api.github.com/users/maryamariyan/events{/privacy}","received_events_url":"https://api.github.com/users/maryamariyan/received_events","type":"User","site_admin":false},"labels":[{"id":179105931,"url":"https://api.github.com/repos/dotnet/corefx/labels/area-System.Runtime.Extensions","name":"area-System.Runtime.Extensions","color":"d4c5f9","default":false},{"id":849541036,"url":"https://api.github.com/repos/dotnet/corefx/labels/tenet-performance-benchmarks","name":"tenet-performance-benchmarks","color":"c2e0c6","default":false}],"state":"open","locked":false,"assignee":null,"assignees":[],"milestone":{"url":"https://api.github.com/repos/dotnet/corefx/milestones/5","html_url":"https://github.com/dotnet/corefx/milestone/5","labels_url":"https://api.github.com/repos/dotnet/corefx/milestones/5/labels","id":1328080,"number":5,"title":"Future","description":"Milestone tracking issues not triaged to a planned release. Work in this milestone may happen, or may not: it is not committed.","creator":{"login":"joshfree","id":1302850,"avatar_url":"https://avatars1.githubusercontent.com/u/1302850?v=4","gravatar_id":"","url":"https://api.github.com/users/joshfree","html_url":"https://github.com/joshfree","followers_url":"https://api.github.com/users/joshfree/followers","following_url":"https://api.github.com/users/joshfree/following{/other_user}","gists_url":"https://api.github.com/users/joshfree/gists{/gist_id}","starred_url":"https://api.github.com/users/joshfree/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/joshfree/subscriptions","organizations_url":"https://api.github.com/users/joshfree/orgs","repos_url":"https://api.github.com/users/joshfree/repos","events_url":"https://api.github.com/users/joshfree/events{/privacy}","received_events_url":"https://api.github.com/users/joshfree/received_events","type":"User","site_admin":false},"open_issues":2043,"closed_issues":107,"state":"open","created_at":"2015-09-29T00:25:45Z","updated_at":"2018-04-18T20:57:19Z","due_on":null,"closed_at":null},"comments":15,"created_at":"2018-04-17T17:00:18Z","updated_at":"2018-04-19T00:38:47Z","closed_at":null,"author_association":"MEMBER","body":"About 30% performance regression for GetTypeCode() test as seen in the chart below\r\n\r\n![capture01](https://user-images.githubusercontent.com/5897654/38884709-3eccc95c-4225-11e8-8e08-c7edaf349619.PNG)\r\n\r\nCorrection:\r\nBelow is the corefx diff from early March:\r\nhttps://github.com/dotnet/corefx/compare/e1f304886a8315fd3303ff0e75dc7595c42b8cd0...dotnet:5cc8f36bec8ee6e67f8576bdc698bef1a280e9b9\r\n\r\nRefer to [benchview](https://benchview/trendline?build_selector=latest&count=2000&aggregate=arithmeticMean&filterTail=one&filterVal=100&interval=INTERVAL_MIN_MAX&rtids=[957]&archids=[23]&mpids=[1292]&cfgids=[2706]&testids=[102192]&jobid=98308&) for more details.\r\n\r\ncc: @kouvel @danmosemsft"},"comment":{"url":"https://api.github.com/repos/dotnet/corefx/issues/comments/382572376","html_url":"https://github.com/dotnet/corefx/issues/29158#issuecomment-382572376","issue_url":"https://api.github.com/repos/dotnet/corefx/issues/29158","id":382572376,"user":{"login":"stephentoub","id":2642209,"avatar_url":"https://avatars0.githubusercontent.com/u/2642209?v=4","gravatar_id":"","url":"https://api.github.com/users/stephentoub","html_url":"https://github.com/stephentoub","followers_url":"https://api.github.com/users/stephentoub/followers","following_url":"https://api.github.com/users/stephentoub/following{/other_user}","gists_url":"https://api.github.com/users/stephentoub/gists{/gist_id}","starred_url":"https://api.github.com/users/stephentoub/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/stephentoub/subscriptions","organizations_url":"https://api.github.com/users/stephentoub/orgs","repos_url":"https://api.github.com/users/stephentoub/repos","events_url":"https://api.github.com/users/stephentoub/events{/privacy}","received_events_url":"https://api.github.com/users/stephentoub/received_events","type":"User","site_admin":false},"created_at":"2018-04-19T00:38:47Z","updated_at":"2018-04-19T00:38:47Z","author_association":"MEMBER","body":"Ah, it's not that the interface isn't used much; it's actually used a lot. It's that we only cast to it rarely, as the cast result is then cached."}}
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