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https://issues.apache.org/jira/browse/MESOS-9896?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16970596#comment-16970596
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Benjamin Mahler commented on MESOS-9896:
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Started a thread here on their mailing list:
[https://groups.google.com/forum/#!topic/protobuf/4qmUqGE5-oQ]
> Consider using protobuf provided json conversion facilities rather than
> custom ones.
> ------------------------------------------------------------------------------------
>
> Key: MESOS-9896
> URL: https://issues.apache.org/jira/browse/MESOS-9896
> Project: Mesos
> Issue Type: Task
> Components: stout
> Reporter: Benjamin Mahler
> Priority: Major
> Labels: foundations
>
> Currently, stout provides custom JSON to protobuf conversion facilities, some
> of which use protobuf reflection.
> When upgrading protobuf to 3.7.x in MESOS-9755, we found that the v0 /state
> response of the master slowed down, and it appears to be due to a performance
> regression in the protobuf reflection code.
> We should file an issue with protobuf, but we should also look into using the
> json conversion code that protobuf provides to see if that can help avoid the
> regression. It may be the case that using the built-in facilities actually
> provides a significant performance benefit, given they don't use reflection.
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