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https://issues.apache.org/jira/browse/MESOS-7713?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16059952#comment-16059952
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Dmitry Zhuk commented on MESOS-7713:
------------------------------------
https://reviews.apache.org/r/60003/
https://reviews.apache.org/r/60002/
> Optimize number of copies made in dispatch/defer mechanism
> ----------------------------------------------------------
>
> Key: MESOS-7713
> URL: https://issues.apache.org/jira/browse/MESOS-7713
> Project: Mesos
> Issue Type: Task
> Components: libprocess
> Affects Versions: 1.2.0, 1.2.1, 1.3.0
> Reporter: Dmitry Zhuk
> Assignee: Dmitry Zhuk
>
> Profiling agents reregistration for a large cluster shows, that many CPU
> cycles are spent on copying protobuf objects. This is partially due to copies
> made by a code like this:
> {code}
> future.then(defer(self(), &Process::method, param);
> {code}
> {{param}} could be copied 8-10 times before it reaches {{method}}.
> Specifically, {{reregisterSlave}} accepts vectors of rather complex objects,
> which are passed to {{defer}}.
> Currently there are some places in {{defer}}, {{dispatch}} and {{Future}}
> code, which could use {{std::move}} and {{std::forward}} to evade some of the
> copies.
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