{"action":"opened","issue":{"url":"https://api.github.com/repos/docker/hub-feedback/issues/652","repository_url":"https://api.github.com/repos/docker/hub-feedback","labels_url":"https://api.github.com/repos/docker/hub-feedback/issues/652/labels{/name}","comments_url":"https://api.github.com/repos/docker/hub-feedback/issues/652/comments","events_url":"https://api.github.com/repos/docker/hub-feedback/issues/652/events","html_url":"https://github.com/docker/hub-feedback/issues/652","id":151316565,"number":652,"title":"Docker Hub Automated builds do not cache layers","user":{"login":"CL0SeY","id":2223922,"avatar_url":"https://avatars.githubusercontent.com/u/2223922?v=3","gravatar_id":"","url":"https://api.github.com/users/CL0SeY","html_url":"https://github.com/CL0SeY","followers_url":"https://api.github.com/users/CL0SeY/followers","following_url":"https://api.github.com/users/CL0SeY/following{/other_user}","gists_url":"https://api.github.com/users/CL0SeY/gists{/gist_id}","starred_url":"https://api.github.com/users/CL0SeY/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/CL0SeY/subscriptions","organizations_url":"https://api.github.com/users/CL0SeY/orgs","repos_url":"https://api.github.com/users/CL0SeY/repos","events_url":"https://api.github.com/users/CL0SeY/events{/privacy}","received_events_url":"https://api.github.com/users/CL0SeY/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":0,"created_at":"2016-04-27T07:25:25Z","updated_at":"2016-04-27T07:25:25Z","closed_at":null,"body":"Builds are slower on Docker Hub compared to building the same Dockerfile on a static same host. This is especially evident if bringing in a large number of dependencies (e.g. node npm install).\r\n\r\nIt would be good if layers from previous build could be re-used across runs. This would reduce the amount of CPU time builds take, and reduce bandwidth requirements."}}