{"action":"created","issue":{"url":"https://api.github.com/repos/jemalloc/jemalloc/issues/1115","repository_url":"https://api.github.com/repos/jemalloc/jemalloc","labels_url":"https://api.github.com/repos/jemalloc/jemalloc/issues/1115/labels{/name}","comments_url":"https://api.github.com/repos/jemalloc/jemalloc/issues/1115/comments","events_url":"https://api.github.com/repos/jemalloc/jemalloc/issues/1115/events","html_url":"https://github.com/jemalloc/jemalloc/issues/1115","id":289979093,"number":1115,"title":"Is there any way to simulate lg_chunk in jemalloc 5?","user":{"login":"rustyx","id":1296899,"avatar_url":"https://avatars0.githubusercontent.com/u/1296899?v=4","gravatar_id":"","url":"https://api.github.com/users/rustyx","html_url":"https://github.com/rustyx","followers_url":"https://api.github.com/users/rustyx/followers","following_url":"https://api.github.com/users/rustyx/following{/other_user}","gists_url":"https://api.github.com/users/rustyx/gists{/gist_id}","starred_url":"https://api.github.com/users/rustyx/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/rustyx/subscriptions","organizations_url":"https://api.github.com/users/rustyx/orgs","repos_url":"https://api.github.com/users/rustyx/repos","events_url":"https://api.github.com/users/rustyx/events{/privacy}","received_events_url":"https://api.github.com/users/rustyx/received_events","type":"User","site_admin":false},"labels":[{"id":59304344,"url":"https://api.github.com/repos/jemalloc/jemalloc/labels/question","name":"question","color":"cc317c","default":true}],"state":"closed","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":4,"created_at":"2018-01-19T13:41:20Z","updated_at":"2018-05-09T21:29:44Z","closed_at":"2018-05-09T21:24:31Z","author_association":"CONTRIBUTOR","body":"In Windows, `VirtualAlloc` is excruciatingly slow. For that reason we use jemalloc 4 with the option `lg_chunk:20`, which makes jemalloc reserve virtual memory in 1MB chunks instead of the default 64KB. That results in an overall application performance improvement of 7%.\r\n\r\nNow with jemalloc 5, the `lg_chunk` option is gone. Consequently, the performance is reduced by 7% (verified).\r\n\r\nThe question is: is there any new setting to have jemalloc reserve virtual memory in large chunks?"},"comment":{"url":"https://api.github.com/repos/jemalloc/jemalloc/issues/comments/387881436","html_url":"https://github.com/jemalloc/jemalloc/issues/1115#issuecomment-387881436","issue_url":"https://api.github.com/repos/jemalloc/jemalloc/issues/1115","id":387881436,"user":{"login":"rustyx","id":1296899,"avatar_url":"https://avatars0.githubusercontent.com/u/1296899?v=4","gravatar_id":"","url":"https://api.github.com/users/rustyx","html_url":"https://github.com/rustyx","followers_url":"https://api.github.com/users/rustyx/followers","following_url":"https://api.github.com/users/rustyx/following{/other_user}","gists_url":"https://api.github.com/users/rustyx/gists{/gist_id}","starred_url":"https://api.github.com/users/rustyx/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/rustyx/subscriptions","organizations_url":"https://api.github.com/users/rustyx/orgs","repos_url":"https://api.github.com/users/rustyx/repos","events_url":"https://api.github.com/users/rustyx/events{/privacy}","received_events_url":"https://api.github.com/users/rustyx/received_events","type":"User","site_admin":false},"created_at":"2018-05-09T21:29:44Z","updated_at":"2018-05-09T21:29:44Z","author_association":"CONTRIBUTOR","body":"Excuse me, but the question isn't answered. We're stuck on version 4 on the Windows platform."}}
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