{"action":"created","issue":{"url":"https://api.github.com/repos/JuliaLang/julia/issues/3645","labels_url":"https://api.github.com/repos/JuliaLang/julia/issues/3645/labels{/name}","comments_url":"https://api.github.com/repos/JuliaLang/julia/issues/3645/comments","events_url":"https://api.github.com/repos/JuliaLang/julia/issues/3645/events","html_url":"https://github.com/JuliaLang/julia/issues/3645","id":16445840,"number":3645,"title":"cat performance","user":{"login":"ViralBShah","id":744411,"avatar_url":"https://avatars.githubusercontent.com/u/744411?v=3","gravatar_id":"","url":"https://api.github.com/users/ViralBShah","html_url":"https://github.com/ViralBShah","followers_url":"https://api.github.com/users/ViralBShah/followers","following_url":"https://api.github.com/users/ViralBShah/following{/other_user}","gists_url":"https://api.github.com/users/ViralBShah/gists{/gist_id}","starred_url":"https://api.github.com/users/ViralBShah/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/ViralBShah/subscriptions","organizations_url":"https://api.github.com/users/ViralBShah/orgs","repos_url":"https://api.github.com/users/ViralBShah/repos","events_url":"https://api.github.com/users/ViralBShah/events{/privacy}","received_events_url":"https://api.github.com/users/ViralBShah/received_events","type":"User","site_admin":false},"labels":[{"url":"https://api.github.com/repos/JuliaLang/julia/labels/performance","name":"performance","color":"d7e102"}],"state":"open","locked":false,"assignee":null,"milestone":{"url":"https://api.github.com/repos/JuliaLang/julia/milestones/8","labels_url":"https://api.github.com/repos/JuliaLang/julia/milestones/8/labels","id":303801,"number":8,"title":"0.4","description":"","creator":{"login":"vtjnash","id":330950,"avatar_url":"https://avatars.githubusercontent.com/u/330950?v=3","gravatar_id":"","url":"https://api.github.com/users/vtjnash","html_url":"https://github.com/vtjnash","followers_url":"https://api.github.com/users/vtjnash/followers","following_url":"https://api.github.com/users/vtjnash/following{/other_user}","gists_url":"https://api.github.com/users/vtjnash/gists{/gist_id}","starred_url":"https://api.github.com/users/vtjnash/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/vtjnash/subscriptions","organizations_url":"https://api.github.com/users/vtjnash/orgs","repos_url":"https://api.github.com/users/vtjnash/repos","events_url":"https://api.github.com/users/vtjnash/events{/privacy}","received_events_url":"https://api.github.com/users/vtjnash/received_events","type":"User","site_admin":false},"open_issues":100,"closed_issues":63,"state":"open","created_at":"2013-04-05T16:15:28Z","updated_at":"2015-02-01T13:07:13Z","due_on":"2015-02-10T08:00:00Z","closed_at":null},"comments":2,"created_at":"2013-07-07T17:45:58Z","updated_at":"2015-02-01T13:14:01Z","closed_at":null,"body":"The `cat` performance compares the performance of various concatenation functions with a simple `setindex` based implementation. The performance benchmark suggests that something is not quite right, since the `setindex` versions are generally much faster:\r\n```\r\nsmall_hvcat          57.877\r\nsmall_hvcat_setind   55.922\r\nlarge_hvcat          11.106\r\nlarge_hvcat_setind    4.726\r\nsmall_hcat           21.654\r\nsmall_hcat_setind    35.115\r\nlarge_hcat            4.293\r\nlarge_hcat_setind     4.306\r\nsmall_vcat           64.364\r\nsmall_vcat_setind    56.346\r\nlarge_vcat            4.761\r\nlarge_vcat_setind     4.710\r\nsmall_catnd         581.283\r\nsmall_catnd_setind  143.262\r\nlarge_catnd           7.422\r\nlarge_catnd_setind    4.897\r\n```"},"comment":{"url":"https://api.github.com/repos/JuliaLang/julia/issues/comments/72364273","html_url":"https://github.com/JuliaLang/julia/issues/3645#issuecomment-72364273","issue_url":"https://api.github.com/repos/JuliaLang/julia/issues/3645","id":72364273,"user":{"login":"ViralBShah","id":744411,"avatar_url":"https://avatars.githubusercontent.com/u/744411?v=3","gravatar_id":"","url":"https://api.github.com/users/ViralBShah","html_url":"https://github.com/ViralBShah","followers_url":"https://api.github.com/users/ViralBShah/followers","following_url":"https://api.github.com/users/ViralBShah/following{/other_user}","gists_url":"https://api.github.com/users/ViralBShah/gists{/gist_id}","starred_url":"https://api.github.com/users/ViralBShah/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/ViralBShah/subscriptions","organizations_url":"https://api.github.com/users/ViralBShah/orgs","repos_url":"https://api.github.com/users/ViralBShah/repos","events_url":"https://api.github.com/users/ViralBShah/events{/privacy}","received_events_url":"https://api.github.com/users/ViralBShah/received_events","type":"User","site_admin":false},"created_at":"2015-02-01T13:14:00Z","updated_at":"2015-02-01T13:14:00Z","body":"Cc: @timholy @Jutho "}}