{"action":"opened","issue":{"url":"https://api.github.com/repos/graalvm/mx/issues/46","repository_url":"https://api.github.com/repos/graalvm/mx","labels_url":"https://api.github.com/repos/graalvm/mx/issues/46/labels{/name}","comments_url":"https://api.github.com/repos/graalvm/mx/issues/46/comments","events_url":"https://api.github.com/repos/graalvm/mx/issues/46/events","html_url":"https://github.com/graalvm/mx/issues/46","id":133376833,"number":46,"title":"limit number of parallel builds","user":{"login":"mbrantner","id":1019696,"avatar_url":"https://avatars.githubusercontent.com/u/1019696?v=3","gravatar_id":"","url":"https://api.github.com/users/mbrantner","html_url":"https://github.com/mbrantner","followers_url":"https://api.github.com/users/mbrantner/followers","following_url":"https://api.github.com/users/mbrantner/following{/other_user}","gists_url":"https://api.github.com/users/mbrantner/gists{/gist_id}","starred_url":"https://api.github.com/users/mbrantner/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/mbrantner/subscriptions","organizations_url":"https://api.github.com/users/mbrantner/orgs","repos_url":"https://api.github.com/users/mbrantner/repos","events_url":"https://api.github.com/users/mbrantner/events{/privacy}","received_events_url":"https://api.github.com/users/mbrantner/received_events","type":"User","site_admin":false},"labels":[{"url":"https://api.github.com/repos/graalvm/mx/labels/enhancement","name":"enhancement","color":"84b6eb"}],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":0,"created_at":"2016-02-13T00:25:58Z","updated_at":"2016-02-13T00:25:58Z","closed_at":null,"body":"It looks like mx either parallelizes the build up to the available number of cpus or doesn't parallelize at all (-n option). It would be great if mx build would support a -j option that allows a user to explicitly specify the level of parallelism."}}