{"action":"created","issue":{"url":"https://api.github.com/repos/Rdatatable/data.table/issues/1660","repository_url":"https://api.github.com/repos/Rdatatable/data.table","labels_url":"https://api.github.com/repos/Rdatatable/data.table/issues/1660/labels{/name}","comments_url":"https://api.github.com/repos/Rdatatable/data.table/issues/1660/comments","events_url":"https://api.github.com/repos/Rdatatable/data.table/issues/1660/events","html_url":"https://github.com/Rdatatable/data.table/issues/1660","id":149566005,"number":1660,"title":"parallelise CsubsetDT","user":{"login":"arunsrinivasan","id":3102045,"avatar_url":"https://avatars.githubusercontent.com/u/3102045?v=3","gravatar_id":"","url":"https://api.github.com/users/arunsrinivasan","html_url":"https://github.com/arunsrinivasan","followers_url":"https://api.github.com/users/arunsrinivasan/followers","following_url":"https://api.github.com/users/arunsrinivasan/following{/other_user}","gists_url":"https://api.github.com/users/arunsrinivasan/gists{/gist_id}","starred_url":"https://api.github.com/users/arunsrinivasan/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/arunsrinivasan/subscriptions","organizations_url":"https://api.github.com/users/arunsrinivasan/orgs","repos_url":"https://api.github.com/users/arunsrinivasan/repos","events_url":"https://api.github.com/users/arunsrinivasan/events{/privacy}","received_events_url":"https://api.github.com/users/arunsrinivasan/received_events","type":"User","site_admin":false},"labels":[{"url":"https://api.github.com/repos/Rdatatable/data.table/labels/internals","name":"internals","color":"009800"}],"state":"open","locked":false,"assignee":{"login":"arunsrinivasan","id":3102045,"avatar_url":"https://avatars.githubusercontent.com/u/3102045?v=3","gravatar_id":"","url":"https://api.github.com/users/arunsrinivasan","html_url":"https://github.com/arunsrinivasan","followers_url":"https://api.github.com/users/arunsrinivasan/followers","following_url":"https://api.github.com/users/arunsrinivasan/following{/other_user}","gists_url":"https://api.github.com/users/arunsrinivasan/gists{/gist_id}","starred_url":"https://api.github.com/users/arunsrinivasan/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/arunsrinivasan/subscriptions","organizations_url":"https://api.github.com/users/arunsrinivasan/orgs","repos_url":"https://api.github.com/users/arunsrinivasan/repos","events_url":"https://api.github.com/users/arunsrinivasan/events{/privacy}","received_events_url":"https://api.github.com/users/arunsrinivasan/received_events","type":"User","site_admin":false},"milestone":{"url":"https://api.github.com/repos/Rdatatable/data.table/milestones/3","html_url":"https://github.com/Rdatatable/data.table/milestones/v1.9.8","labels_url":"https://api.github.com/repos/Rdatatable/data.table/milestones/3/labels","id":812342,"number":3,"title":"v1.9.8","description":"","creator":{"login":"arunsrinivasan","id":3102045,"avatar_url":"https://avatars.githubusercontent.com/u/3102045?v=3","gravatar_id":"","url":"https://api.github.com/users/arunsrinivasan","html_url":"https://github.com/arunsrinivasan","followers_url":"https://api.github.com/users/arunsrinivasan/followers","following_url":"https://api.github.com/users/arunsrinivasan/following{/other_user}","gists_url":"https://api.github.com/users/arunsrinivasan/gists{/gist_id}","starred_url":"https://api.github.com/users/arunsrinivasan/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/arunsrinivasan/subscriptions","organizations_url":"https://api.github.com/users/arunsrinivasan/orgs","repos_url":"https://api.github.com/users/arunsrinivasan/repos","events_url":"https://api.github.com/users/arunsrinivasan/events{/privacy}","received_events_url":"https://api.github.com/users/arunsrinivasan/received_events","type":"User","site_admin":false},"open_issues":22,"closed_issues":130,"state":"open","created_at":"2014-10-03T08:24:10Z","updated_at":"2016-04-25T15:43:31Z","due_on":null,"closed_at":null},"comments":7,"created_at":"2016-04-19T19:54:24Z","updated_at":"2016-04-26T12:23:33Z","closed_at":null,"body":"- [x] parallelise `CsubsetDT`\r\n- [ ] resolve *thread-safe* issues if any (on `SET_STRING_ELT` / `SET_VECTOR_ELT`)\r\n- [x] add provision for `nthreads`\r\n"},"comment":{"url":"https://api.github.com/repos/Rdatatable/data.table/issues/comments/214722143","html_url":"https://github.com/Rdatatable/data.table/issues/1660#issuecomment-214722143","issue_url":"https://api.github.com/repos/Rdatatable/data.table/issues/1660","id":214722143,"user":{"login":"HenrikBengtsson","id":1616850,"avatar_url":"https://avatars.githubusercontent.com/u/1616850?v=3","gravatar_id":"","url":"https://api.github.com/users/HenrikBengtsson","html_url":"https://github.com/HenrikBengtsson","followers_url":"https://api.github.com/users/HenrikBengtsson/followers","following_url":"https://api.github.com/users/HenrikBengtsson/following{/other_user}","gists_url":"https://api.github.com/users/HenrikBengtsson/gists{/gist_id}","starred_url":"https://api.github.com/users/HenrikBengtsson/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/HenrikBengtsson/subscriptions","organizations_url":"https://api.github.com/users/HenrikBengtsson/orgs","repos_url":"https://api.github.com/users/HenrikBengtsson/repos","events_url":"https://api.github.com/users/HenrikBengtsson/events{/privacy}","received_events_url":"https://api.github.com/users/HenrikBengtsson/received_events","type":"User","site_admin":false},"created_at":"2016-04-26T12:23:32Z","updated_at":"2016-04-26T12:23:32Z","body":"Good to hear. Here's a comment by Roger Koenker where implicit and explicit parallelism competing to use the cores caused a major slow down: https://stat.ethz.ch/pipermail/r-sig-hpc/2014-August/001914.html."}}