{"action":"created","issue":{"url":"https://api.github.com/repos/dotnet/corefx/issues/31825","repository_url":"https://api.github.com/repos/dotnet/corefx","labels_url":"https://api.github.com/repos/dotnet/corefx/issues/31825/labels{/name}","comments_url":"https://api.github.com/repos/dotnet/corefx/issues/31825/comments","events_url":"https://api.github.com/repos/dotnet/corefx/issues/31825/events","html_url":"https://github.com/dotnet/corefx/issues/31825","id":351652312,"node_id":"MDU6SXNzdWUzNTE2NTIzMTI=","number":31825,"title":"Investigate perf difference between multiple `SetAllVector128` and a `Load + Permute` sequence","user":{"login":"tannergooding","id":10487869,"node_id":"MDQ6VXNlcjEwNDg3ODY5","avatar_url":"https://avatars3.githubusercontent.com/u/10487869?v=4","gravatar_id":"","url":"https://api.github.com/users/tannergooding","html_url":"https://github.com/tannergooding","followers_url":"https://api.github.com/users/tannergooding/followers","following_url":"https://api.github.com/users/tannergooding/following{/other_user}","gists_url":"https://api.github.com/users/tannergooding/gists{/gist_id}","starred_url":"https://api.github.com/users/tannergooding/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/tannergooding/subscriptions","organizations_url":"https://api.github.com/users/tannergooding/orgs","repos_url":"https://api.github.com/users/tannergooding/repos","events_url":"https://api.github.com/users/tannergooding/events{/privacy}","received_events_url":"https://api.github.com/users/tannergooding/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":{"login":"tannergooding","id":10487869,"node_id":"MDQ6VXNlcjEwNDg3ODY5","avatar_url":"https://avatars3.githubusercontent.com/u/10487869?v=4","gravatar_id":"","url":"https://api.github.com/users/tannergooding","html_url":"https://github.com/tannergooding","followers_url":"https://api.github.com/users/tannergooding/followers","following_url":"https://api.github.com/users/tannergooding/following{/other_user}","gists_url":"https://api.github.com/users/tannergooding/gists{/gist_id}","starred_url":"https://api.github.com/users/tannergooding/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/tannergooding/subscriptions","organizations_url":"https://api.github.com/users/tannergooding/orgs","repos_url":"https://api.github.com/users/tannergooding/repos","events_url":"https://api.github.com/users/tannergooding/events{/privacy}","received_events_url":"https://api.github.com/users/tannergooding/received_events","type":"User","site_admin":false},"assignees":[{"login":"tannergooding","id":10487869,"node_id":"MDQ6VXNlcjEwNDg3ODY5","avatar_url":"https://avatars3.githubusercontent.com/u/10487869?v=4","gravatar_id":"","url":"https://api.github.com/users/tannergooding","html_url":"https://github.com/tannergooding","followers_url":"https://api.github.com/users/tannergooding/followers","following_url":"https://api.github.com/users/tannergooding/following{/other_user}","gists_url":"https://api.github.com/users/tannergooding/gists{/gist_id}","starred_url":"https://api.github.com/users/tannergooding/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/tannergooding/subscriptions","organizations_url":"https://api.github.com/users/tannergooding/orgs","repos_url":"https://api.github.com/users/tannergooding/repos","events_url":"https://api.github.com/users/tannergooding/events{/privacy}","received_events_url":"https://api.github.com/users/tannergooding/received_events","type":"User","site_admin":false}],"milestone":null,"comments":0,"created_at":"2018-08-17T16:07:33Z","updated_at":"2018-08-17T16:08:09Z","closed_at":null,"author_association":"MEMBER","body":"As per the comment here: https://github.com/dotnet/corefx/pull/31779#discussion_r210330631\r\n\r\nI would expect that an explicit `Load + four Permute` operations (for four sequential memory addresses) would be faster than (or at least as fast as) four `SetAllVector128` (which should be equivalent to four loads and four permutes).\r\n\r\nInvestigate the codegen between the two to see if there is some bug blocking this optimization."},"comment":{"url":"https://api.github.com/repos/dotnet/corefx/issues/comments/413913536","html_url":"https://github.com/dotnet/corefx/issues/31825#issuecomment-413913536","issue_url":"https://api.github.com/repos/dotnet/corefx/issues/31825","id":413913536,"node_id":"MDEyOklzc3VlQ29tbWVudDQxMzkxMzUzNg==","user":{"login":"tannergooding","id":10487869,"node_id":"MDQ6VXNlcjEwNDg3ODY5","avatar_url":"https://avatars3.githubusercontent.com/u/10487869?v=4","gravatar_id":"","url":"https://api.github.com/users/tannergooding","html_url":"https://github.com/tannergooding","followers_url":"https://api.github.com/users/tannergooding/followers","following_url":"https://api.github.com/users/tannergooding/following{/other_user}","gists_url":"https://api.github.com/users/tannergooding/gists{/gist_id}","starred_url":"https://api.github.com/users/tannergooding/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/tannergooding/subscriptions","organizations_url":"https://api.github.com/users/tannergooding/orgs","repos_url":"https://api.github.com/users/tannergooding/repos","events_url":"https://api.github.com/users/tannergooding/events{/privacy}","received_events_url":"https://api.github.com/users/tannergooding/received_events","type":"User","site_admin":false},"created_at":"2018-08-17T16:08:09Z","updated_at":"2018-08-17T16:08:09Z","author_association":"MEMBER","body":"CC. @fiigii, @eerhardt, @CarolEidt \r\n\r\nAlso CC. @EgorBo"}}
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