{"action":"opened","issue":{"url":"https://api.github.com/repos/wkhtmltopdf/wkhtmltopdf/issues/2357","labels_url":"https://api.github.com/repos/wkhtmltopdf/wkhtmltopdf/issues/2357/labels{/name}","comments_url":"https://api.github.com/repos/wkhtmltopdf/wkhtmltopdf/issues/2357/comments","events_url":"https://api.github.com/repos/wkhtmltopdf/wkhtmltopdf/issues/2357/events","html_url":"https://github.com/wkhtmltopdf/wkhtmltopdf/issues/2357","id":75576778,"number":2357,"title":"How is \"--cache-dir\" working in practice?","user":{"login":"Vad1mo","id":1492007,"avatar_url":"https://avatars.githubusercontent.com/u/1492007?v=3","gravatar_id":"","url":"https://api.github.com/users/Vad1mo","html_url":"https://github.com/Vad1mo","followers_url":"https://api.github.com/users/Vad1mo/followers","following_url":"https://api.github.com/users/Vad1mo/following{/other_user}","gists_url":"https://api.github.com/users/Vad1mo/gists{/gist_id}","starred_url":"https://api.github.com/users/Vad1mo/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/Vad1mo/subscriptions","organizations_url":"https://api.github.com/users/Vad1mo/orgs","repos_url":"https://api.github.com/users/Vad1mo/repos","events_url":"https://api.github.com/users/Vad1mo/events{/privacy}","received_events_url":"https://api.github.com/users/Vad1mo/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":0,"created_at":"2015-05-12T11:56:27Z","updated_at":"2015-05-12T11:56:27Z","closed_at":null,"body":"We enabled \"--cache-dir\" to improve the performance but it only works partly mainly because we don't understand  how is working.\r\n\r\nWhat is cached and how. Is HTML, CSS and JS cached?\r\nHow is it controlled? Cache-Control in response Header?\r\n\r\nOut goal is to cache and reuse CSS and JS as they are always stay the same. Can this be controlled via response header? "}}