{"action":"created","issue":{"url":"https://api.github.com/repos/apple/swift/issues/5722","repository_url":"https://api.github.com/repos/apple/swift","labels_url":"https://api.github.com/repos/apple/swift/issues/5722/labels{/name}","comments_url":"https://api.github.com/repos/apple/swift/issues/5722/comments","events_url":"https://api.github.com/repos/apple/swift/issues/5722/events","html_url":"https://github.com/apple/swift/pull/5722","id":188792542,"number":5722,"title":"Resolve ABI FIXME#158","user":{"login":"Gankro","id":1136864,"avatar_url":"https://avatars.githubusercontent.com/u/1136864?v=3","gravatar_id":"","url":"https://api.github.com/users/Gankro","html_url":"https://github.com/Gankro","followers_url":"https://api.github.com/users/Gankro/followers","following_url":"https://api.github.com/users/Gankro/following{/other_user}","gists_url":"https://api.github.com/users/Gankro/gists{/gist_id}","starred_url":"https://api.github.com/users/Gankro/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/Gankro/subscriptions","organizations_url":"https://api.github.com/users/Gankro/orgs","repos_url":"https://api.github.com/users/Gankro/repos","events_url":"https://api.github.com/users/Gankro/events{/privacy}","received_events_url":"https://api.github.com/users/Gankro/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":4,"created_at":"2016-11-11T16:06:10Z","updated_at":"2016-11-11T16:12:57Z","closed_at":null,"pull_request":{"url":"https://api.github.com/repos/apple/swift/pulls/5722","html_url":"https://github.com/apple/swift/pull/5722","diff_url":"https://github.com/apple/swift/pull/5722.diff","patch_url":"https://github.com/apple/swift/pull/5722.patch"},"body":"So the comment and rdar are entirely unhelpful as to the actual intent here. I get the impression that completely killing _UnmanagedAnyObjectArray was the desired outcome, but quite frankly this just makes the code way more messy and error-prone for no obvious benefit.\r\n\r\nThat said, if anyone knows what the *actual* performance concern here was, I'm all ears. I have no real intuition on when stricter aliasing is and isn't a win. (Although this hardly seems like it makes the aliasing any stricter?)\r\n\r\nAt very least, this code is a bit cleaner."},"comment":{"url":"https://api.github.com/repos/apple/swift/issues/comments/259992045","html_url":"https://github.com/apple/swift/pull/5722#issuecomment-259992045","issue_url":"https://api.github.com/repos/apple/swift/issues/5722","id":259992045,"user":{"login":"Gankro","id":1136864,"avatar_url":"https://avatars.githubusercontent.com/u/1136864?v=3","gravatar_id":"","url":"https://api.github.com/users/Gankro","html_url":"https://github.com/Gankro","followers_url":"https://api.github.com/users/Gankro/followers","following_url":"https://api.github.com/users/Gankro/following{/other_user}","gists_url":"https://api.github.com/users/Gankro/gists{/gist_id}","starred_url":"https://api.github.com/users/Gankro/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/Gankro/subscriptions","organizations_url":"https://api.github.com/users/Gankro/orgs","repos_url":"https://api.github.com/users/Gankro/repos","events_url":"https://api.github.com/users/Gankro/events{/privacy}","received_events_url":"https://api.github.com/users/Gankro/received_events","type":"User","site_admin":false},"created_at":"2016-11-11T16:12:57Z","updated_at":"2016-11-11T16:12:57Z","body":"Oh, right: \r\n\r\nFixes rdar://problem/16861508"}}
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