{"action":"opened","issue":{"url":"https://api.github.com/repos/wdavidw/node-stream-transform/issues/20","repository_url":"https://api.github.com/repos/wdavidw/node-stream-transform","labels_url":"https://api.github.com/repos/wdavidw/node-stream-transform/issues/20/labels{/name}","comments_url":"https://api.github.com/repos/wdavidw/node-stream-transform/issues/20/comments","events_url":"https://api.github.com/repos/wdavidw/node-stream-transform/issues/20/events","html_url":"https://github.com/wdavidw/node-stream-transform/issues/20","id":177770325,"number":20,"title":"parallel can use only 4 cores...?","user":{"login":"FreeWillaert","id":8416990,"avatar_url":"https://avatars.githubusercontent.com/u/8416990?v=3","gravatar_id":"","url":"https://api.github.com/users/FreeWillaert","html_url":"https://github.com/FreeWillaert","followers_url":"https://api.github.com/users/FreeWillaert/followers","following_url":"https://api.github.com/users/FreeWillaert/following{/other_user}","gists_url":"https://api.github.com/users/FreeWillaert/gists{/gist_id}","starred_url":"https://api.github.com/users/FreeWillaert/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/FreeWillaert/subscriptions","organizations_url":"https://api.github.com/users/FreeWillaert/orgs","repos_url":"https://api.github.com/users/FreeWillaert/repos","events_url":"https://api.github.com/users/FreeWillaert/events{/privacy}","received_events_url":"https://api.github.com/users/FreeWillaert/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":0,"created_at":"2016-09-19T12:22:04Z","updated_at":"2016-09-19T12:22:04Z","closed_at":null,"body":"I'm using the Transformer to hash passwords in a CSV file, using [bcrypt](https://www.npmjs.com/package/bcrypt), with the Stream API: piping input stream => transformer => stringifier => output stream.\r\n\r\nOn my development virtual machine with 4 cores assigned, just setting parallel: 100 was enough to use all cores.\r\n\r\nNow I'm testing on a machine with 36 cores (EC2 c4.8xlarge), but no matter what I try, only 4 cores are used...\r\n\r\nIs there something obvious I'm missing? With the single-threaded nature of node in mind, is this scenario supposed to work?"}}
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