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https://issues.apache.org/jira/browse/HBASE-28613?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17848862#comment-17848862
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Istvan Toth commented on HBASE-28613:
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Hmm, I have re-run the tests, and now I see similar results with the old code.
Will need to investigate further.
> Use streaming when marshalling protobuf REST output
> ---------------------------------------------------
>
> Key: HBASE-28613
> URL: https://issues.apache.org/jira/browse/HBASE-28613
> Project: HBase
> Issue Type: Improvement
> Components: REST
> Reporter: Istvan Toth
> Assignee: Istvan Toth
> Priority: Major
>
> We are currently marshalling protobuf into a byte array, and then send that
> to the client.
> This is both slow and memory intensive.
> Using streaming instead results in huge perf improvements. In my bechnmark,
> both the wall clock time was almost halved, while the REST server CPU usage
> was reduced by 40%.
> wall clock: 120s ->65s
> Total REST CPU: 300s -> 180s
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