[jira] [Updated] (MESOS-4566) Avoid unnecessary temporary `std::string` constructions and copies in `jsonify`.

["Michael Park (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/MESOS-4566?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Michael Park updated MESOS-4566:
--------------------------------
    Shepherd: Joris Van Remoortere  (was: Benjamin Hindman)

> Avoid unnecessary temporary `std::string` constructions and copies in `jsonify`.
> --------------------------------------------------------------------------------
>
>                 Key: MESOS-4566
>                 URL: https://issues.apache.org/jira/browse/MESOS-4566
>             Project: Mesos
>          Issue Type: Improvement
>          Components: stout
>            Reporter: Michael Park
>            Assignee: Michael Park
>              Labels: mesosphere
>             Fix For: 0.28.0
>
>
> A few of the critical code paths in {{jsonify}} involve unnecessary temporary string construction and copies (inherited from the {{JSON::*}}). For example, {{strings::trim}} is used to remove trailing 0s from printing {{double}}s. We print {{double}}s a lot, and therefore constructing a temporary {{std::string}} on printing of every double is extremely costly. This ticket captures the work involved in avoiding them.



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