{"action":"created","issue":{"url":"https://api.github.com/repos/golang/go/issues/15306","repository_url":"https://api.github.com/repos/golang/go","labels_url":"https://api.github.com/repos/golang/go/issues/15306/labels{/name}","comments_url":"https://api.github.com/repos/golang/go/issues/15306/comments","events_url":"https://api.github.com/repos/golang/go/issues/15306/events","html_url":"https://github.com/golang/go/issues/15306","id":148424236,"number":15306,"title":"cmd/compile: make deadcode pass cheaper and do it after cse","user":{"login":"josharian","id":67496,"avatar_url":"https://avatars.githubusercontent.com/u/67496?v=3","gravatar_id":"","url":"https://api.github.com/users/josharian","html_url":"https://github.com/josharian","followers_url":"https://api.github.com/users/josharian/followers","following_url":"https://api.github.com/users/josharian/following{/other_user}","gists_url":"https://api.github.com/users/josharian/gists{/gist_id}","starred_url":"https://api.github.com/users/josharian/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/josharian/subscriptions","organizations_url":"https://api.github.com/users/josharian/orgs","repos_url":"https://api.github.com/users/josharian/repos","events_url":"https://api.github.com/users/josharian/events{/privacy}","received_events_url":"https://api.github.com/users/josharian/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":{"url":"https://api.github.com/repos/golang/go/milestones/6","html_url":"https://github.com/golang/go/milestones/Unplanned","labels_url":"https://api.github.com/repos/golang/go/milestones/6/labels","id":1055141,"number":6,"title":"Unplanned","description":"No plan to fix in any specific release.\r\n","creator":{"login":"rsc","id":104030,"avatar_url":"https://avatars.githubusercontent.com/u/104030?v=3","gravatar_id":"","url":"https://api.github.com/users/rsc","html_url":"https://github.com/rsc","followers_url":"https://api.github.com/users/rsc/followers","following_url":"https://api.github.com/users/rsc/following{/other_user}","gists_url":"https://api.github.com/users/rsc/gists{/gist_id}","starred_url":"https://api.github.com/users/rsc/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/rsc/subscriptions","organizations_url":"https://api.github.com/users/rsc/orgs","repos_url":"https://api.github.com/users/rsc/repos","events_url":"https://api.github.com/users/rsc/events{/privacy}","received_events_url":"https://api.github.com/users/rsc/received_events","type":"User","site_admin":false},"open_issues":1323,"closed_issues":351,"state":"open","created_at":"2015-04-06T20:47:19Z","updated_at":"2016-04-15T14:33:08Z","due_on":"2099-12-31T05:00:00Z","closed_at":null},"comments":1,"created_at":"2016-04-14T17:03:03Z","updated_at":"2016-04-15T14:43:15Z","closed_at":null,"body":"[moved from discussion in CL 21981]\r\n\r\nCSE can remove many values, so it'd be good to do a deadcode pass promptly after it, to speed up other passes. We used to, but it has slowly drifted away. However, deadcode allocates some potentially large slices: two work lists (small) and two bool slices (larger). We should make at least those bool slices reusable in f.Config and then add a deadcode after CSE.\r\n\r\ncc @tzneal \r\n\r\nBtw, @bradfitz, do you think it's worth having a label for compiler performance/speed (as opposed to compiled code performance)?\r\n"},"comment":{"url":"https://api.github.com/repos/golang/go/issues/comments/210488207","html_url":"https://github.com/golang/go/issues/15306#issuecomment-210488207","issue_url":"https://api.github.com/repos/golang/go/issues/15306","id":210488207,"user":{"login":"bradfitz","id":2621,"avatar_url":"https://avatars.githubusercontent.com/u/2621?v=3","gravatar_id":"","url":"https://api.github.com/users/bradfitz","html_url":"https://github.com/bradfitz","followers_url":"https://api.github.com/users/bradfitz/followers","following_url":"https://api.github.com/users/bradfitz/following{/other_user}","gists_url":"https://api.github.com/users/bradfitz/gists{/gist_id}","starred_url":"https://api.github.com/users/bradfitz/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/bradfitz/subscriptions","organizations_url":"https://api.github.com/users/bradfitz/orgs","repos_url":"https://api.github.com/users/bradfitz/repos","events_url":"https://api.github.com/users/bradfitz/events{/privacy}","received_events_url":"https://api.github.com/users/bradfitz/received_events","type":"User","site_admin":false},"created_at":"2016-04-15T14:43:15Z","updated_at":"2016-04-15T14:43:15Z","body":"We used to have too many labels, so we're trying to make do with fewer these days. But build speed is a focus, so, sure. We can always delete it if unused."}}