{"action":"created","issue":{"url":"https://api.github.com/repos/Microsoft/visualfsharp/issues/94","labels_url":"https://api.github.com/repos/Microsoft/visualfsharp/issues/94/labels{/name}","comments_url":"https://api.github.com/repos/Microsoft/visualfsharp/issues/94/comments","events_url":"https://api.github.com/repos/Microsoft/visualfsharp/issues/94/events","html_url":"https://github.com/Microsoft/visualfsharp/issues/94","id":55391335,"number":94,"title":"Add support for parallel build in VS","user":{"login":"KevinRansom","id":5175830,"avatar_url":"https://avatars.githubusercontent.com/u/5175830?v=3","gravatar_id":"","url":"https://api.github.com/users/KevinRansom","html_url":"https://github.com/KevinRansom","followers_url":"https://api.github.com/users/KevinRansom/followers","following_url":"https://api.github.com/users/KevinRansom/following{/other_user}","gists_url":"https://api.github.com/users/KevinRansom/gists{/gist_id}","starred_url":"https://api.github.com/users/KevinRansom/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/KevinRansom/subscriptions","organizations_url":"https://api.github.com/users/KevinRansom/orgs","repos_url":"https://api.github.com/users/KevinRansom/repos","events_url":"https://api.github.com/users/KevinRansom/events{/privacy}","received_events_url":"https://api.github.com/users/KevinRansom/received_events","type":"User","site_admin":false},"labels":[{"url":"https://api.github.com/repos/Microsoft/visualfsharp/labels/feature%20request","name":"feature request","color":"207de5"}],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":10,"created_at":"2015-01-25T01:15:14Z","updated_at":"2015-06-07T09:01:53Z","closed_at":null,"body":"Originally opened on [CodePlex](https://visualfsharp.codeplex.com/workitem/186) by[Vaskir](https://www.codeplex.com/site/users/view/vaskir)\r\n\r\nBefore I installed Daily Builds Preview 12-01-2014 my largdoee solution (~180 projects, ~80 of which are F# ones) was built in about 3 minutes. Now it's built in about 10 minutes. \r\n\r\nI looked at fsc.exe processes in Task manager and I didn't see more than one of them at a moment. \r\nI have set number of parallel builds to 8 in VS settings. It seems that parallel build is broken in the latest Preview. \r\n\r\n>Edit (latkin) \r\n>This is longstanding behavior and expected, it is not a regression/break. Updating the bug to reflect >this as a feature request for supporting parallel build.\r\n\r\n>comments\r\n>latkin wrote Dec 2, 2014 at 11:19 AM [x] \r\n>Can you share your large solution?\r\n>>vaskir wrote Dec 2, 2014 at 12:04 PM [x] \r\n>>Unfortunately, I cannot.\r\n>>>pavelhritonenko wrote Dec 9, 2014 at 3:46 AM [x] \r\n>>>Latest release have same issue\r\n>>>>latkin wrote Dec 17, 2014 at 12:14 PM [x] \r\n>>>>Interesting, I am having trouble reproducing this. Rather, I am not seeing even older versions do parallel build. Can someone positively confirm on an older release that multiple fsc.exe processes are fanned out with a multi-project solution?\r\n>>>>Installing a new preview might cause a slowdown because binaries are not yet ngen'ed.... Does running \"ngen executeQueuedItems\" form admin prompt help here?\r\n>>>>>vaskir wrote Dec 17, 2014 at 11:38 PM [x] \r\n>>>>>OK, so it's not the latest preview issue. \r\n>>>>>Maybe it's better to close this issue and open a new one, something like \"parallel build has never worked\"?\r\n>>>>>>KevinRansom wrote Dec 18, 2014 at 1:41 AM [x] \r\n>>>>>>Updated the title to: \r\n>>>>>>Parallel build does not work when building multiple F# projects with the IDE\r\n>>>>>>>vaskir wrote Dec 19, 2014 at 4:37 AM [x] \r\n>>>>>>>I've compared time needed to rebuild by solution:\r\n>>>>>>>Visual Studio: 00:04:18\r\n>>>>>>>FAKE: 00:01:47\r\n>>>>>>> FAKE was loading 4-core i7 CPU at 100% most of the time (wow).\r\n>>>>>>>So, parallel build in VS could make building solutions containing many F# projects almost 2.5x faster."},"comment":{"url":"https://api.github.com/repos/Microsoft/visualfsharp/issues/comments/109723057","html_url":"https://github.com/Microsoft/visualfsharp/issues/94#issuecomment-109723057","issue_url":"https://api.github.com/repos/Microsoft/visualfsharp/issues/94","id":109723057,"user":{"login":"vasily-kirichenko","id":873919,"avatar_url":"https://avatars.githubusercontent.com/u/873919?v=3","gravatar_id":"","url":"https://api.github.com/users/vasily-kirichenko","html_url":"https://github.com/vasily-kirichenko","followers_url":"https://api.github.com/users/vasily-kirichenko/followers","following_url":"https://api.github.com/users/vasily-kirichenko/following{/other_user}","gists_url":"https://api.github.com/users/vasily-kirichenko/gists{/gist_id}","starred_url":"https://api.github.com/users/vasily-kirichenko/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/vasily-kirichenko/subscriptions","organizations_url":"https://api.github.com/users/vasily-kirichenko/orgs","repos_url":"https://api.github.com/users/vasily-kirichenko/repos","events_url":"https://api.github.com/users/vasily-kirichenko/events{/privacy}","received_events_url":"https://api.github.com/users/vasily-kirichenko/received_events","type":"User","site_admin":false},"created_at":"2015-06-07T09:01:53Z","updated_at":"2015-06-07T09:01:53Z","body":"@vladima just created that registry key, then devenv /setup. No difference, parallel build is not enabled."}}