{"action":"created","issue":{"url":"https://api.github.com/repos/brianmhunt/knockout-fast-foreach/issues/35","labels_url":"https://api.github.com/repos/brianmhunt/knockout-fast-foreach/issues/35/labels{/name}","comments_url":"https://api.github.com/repos/brianmhunt/knockout-fast-foreach/issues/35/comments","events_url":"https://api.github.com/repos/brianmhunt/knockout-fast-foreach/issues/35/events","html_url":"https://github.com/brianmhunt/knockout-fast-foreach/issues/35","id":121704319,"number":35,"title":"Asynchronous, but still janking on large (>2k) lists","user":{"login":"krnlde","id":1087002,"avatar_url":"https://avatars.githubusercontent.com/u/1087002?v=3","gravatar_id":"","url":"https://api.github.com/users/krnlde","html_url":"https://github.com/krnlde","followers_url":"https://api.github.com/users/krnlde/followers","following_url":"https://api.github.com/users/krnlde/following{/other_user}","gists_url":"https://api.github.com/users/krnlde/gists{/gist_id}","starred_url":"https://api.github.com/users/krnlde/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/krnlde/subscriptions","organizations_url":"https://api.github.com/users/krnlde/orgs","repos_url":"https://api.github.com/users/krnlde/repos","events_url":"https://api.github.com/users/krnlde/events{/privacy}","received_events_url":"https://api.github.com/users/krnlde/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":24,"created_at":"2015-12-11T13:02:47Z","updated_at":"2015-12-11T15:58:21Z","closed_at":null,"body":"As mentioned here knockout/knockout/issues/1954 your fastForEach implementation has recognizable improvements over the original ko-foreach. But still I experience big janks of 1-2 sec when iterating over a list with 5k entries.\r\n\r\nMind the chrome timeline capture here:\r\n![image](https://cloud.githubusercontent.com/assets/1087002/11744317/94cde36e-a00f-11e5-888f-0344acb2c705.png)\r\n\r\nThe biggest part of the 2876ms frame is the purple \"recalculating style\". I didn't get into the \"animation frame fired\" JS part too deep, but it feels like it is not janking.\r\n"},"comment":{"url":"https://api.github.com/repos/brianmhunt/knockout-fast-foreach/issues/comments/163973774","html_url":"https://github.com/brianmhunt/knockout-fast-foreach/issues/35#issuecomment-163973774","issue_url":"https://api.github.com/repos/brianmhunt/knockout-fast-foreach/issues/35","id":163973774,"user":{"login":"krnlde","id":1087002,"avatar_url":"https://avatars.githubusercontent.com/u/1087002?v=3","gravatar_id":"","url":"https://api.github.com/users/krnlde","html_url":"https://github.com/krnlde","followers_url":"https://api.github.com/users/krnlde/followers","following_url":"https://api.github.com/users/krnlde/following{/other_user}","gists_url":"https://api.github.com/users/krnlde/gists{/gist_id}","starred_url":"https://api.github.com/users/krnlde/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/krnlde/subscriptions","organizations_url":"https://api.github.com/users/krnlde/orgs","repos_url":"https://api.github.com/users/krnlde/repos","events_url":"https://api.github.com/users/krnlde/events{/privacy}","received_events_url":"https://api.github.com/users/krnlde/received_events","type":"User","site_admin":false},"created_at":"2015-12-11T15:58:21Z","updated_at":"2015-12-11T15:58:21Z","body":"> it can be a very long atomic thing\r\nlol. Which consequently can't be deferred to multiple event-loops. Also WebWorkers won't work here, because they don't have access to the DOM afaik."}}