{"action":"closed","issue":{"url":"https://api.github.com/repos/SigmaX/SigmaEC/issues/13","labels_url":"https://api.github.com/repos/SigmaX/SigmaEC/issues/13/labels{/name}","comments_url":"https://api.github.com/repos/SigmaX/SigmaEC/issues/13/comments","events_url":"https://api.github.com/repos/SigmaX/SigmaEC/issues/13/events","html_url":"https://github.com/SigmaX/SigmaEC/issues/13","id":59262891,"number":13,"title":"Handle Noisy Fitness Functions","user":{"login":"SigmaX","id":313154,"avatar_url":"https://avatars.githubusercontent.com/u/313154?v=3","gravatar_id":"","url":"https://api.github.com/users/SigmaX","html_url":"https://github.com/SigmaX","followers_url":"https://api.github.com/users/SigmaX/followers","following_url":"https://api.github.com/users/SigmaX/following{/other_user}","gists_url":"https://api.github.com/users/SigmaX/gists{/gist_id}","starred_url":"https://api.github.com/users/SigmaX/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/SigmaX/subscriptions","organizations_url":"https://api.github.com/users/SigmaX/orgs","repos_url":"https://api.github.com/users/SigmaX/repos","events_url":"https://api.github.com/users/SigmaX/events{/privacy}","received_events_url":"https://api.github.com/users/SigmaX/received_events","type":"User","site_admin":false},"labels":[{"url":"https://api.github.com/repos/SigmaX/SigmaEC/labels/enhancement","name":"enhancement","color":"84b6eb"}],"state":"closed","locked":false,"assignee":{"login":"SigmaX","id":313154,"avatar_url":"https://avatars.githubusercontent.com/u/313154?v=3","gravatar_id":"","url":"https://api.github.com/users/SigmaX","html_url":"https://github.com/SigmaX","followers_url":"https://api.github.com/users/SigmaX/followers","following_url":"https://api.github.com/users/SigmaX/following{/other_user}","gists_url":"https://api.github.com/users/SigmaX/gists{/gist_id}","starred_url":"https://api.github.com/users/SigmaX/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/SigmaX/subscriptions","organizations_url":"https://api.github.com/users/SigmaX/orgs","repos_url":"https://api.github.com/users/SigmaX/repos","events_url":"https://api.github.com/users/SigmaX/events{/privacy}","received_events_url":"https://api.github.com/users/SigmaX/received_events","type":"User","site_admin":false},"milestone":null,"comments":0,"created_at":"2015-02-27T16:57:58Z","updated_at":"2015-03-13T02:35:41Z","closed_at":"2015-03-13T02:35:41Z","body":"Right now, we can either re-evaluate individuals every time their fitness attribute is read for any reason (expensive), or we can cache their fitness with a CachedObjective and never re-evaluate at all.\r\n\r\nWe need to re-evaluate individuals that have been freshly generated.  One way to do this is to give up on immutability and make fitness a field of the individual, like ECJ does.  Another way is to tell the cache to clear itself once a generation (too brittle?).  Perhaps we can leave the cache as-is, but make the individual ID part of the key?"}}