[jira] [Commented] (MESOS-4235) JSON generation performance improvement

["Cong Wang (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/MESOS-4235?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15127275#comment-15127275 ] 

Cong Wang commented on MESOS-4235:
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Hi, [~mcypark]
Since all the subtickets are resolved, I assume this one is resolved too in the latest code base?

> JSON generation performance improvement
> ---------------------------------------
>
>                 Key: MESOS-4235
>                 URL: https://issues.apache.org/jira/browse/MESOS-4235
>             Project: Mesos
>          Issue Type: Epic
>          Components: libprocess, master, stout
>            Reporter: Michael Park
>            Assignee: Michael Park
>              Labels: mesosphere, scalability, twitter
>
> This is an epic which evolved from MESOS-2353. As mentioned in the description of MESOS-2353, most of the work is spent performing memory allocation/deallocation. Some preliminary efforts have been made such as calling {{reserve}} for {{JSON::Array}}. There are still plenty of dynamic allocations being made especially from instances of {{JSON::Object}} which hold a {{std::map}} as a member.
> The current approach being adopted is to introduce a {{jsonify}} function which by-passes these unnecessary dynamic allocations and copying, and to simply hold references to the underlying objects.
> We plan to first introduce the {{jsonify}} function to {{stout}}, and update master's {{state}} endpoint, then proceed to update the rest of the system.



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