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https://issues.apache.org/jira/browse/SOLR-486?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12589074#action_12589074
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Yonik Seeley commented on SOLR-486:
-----------------------------------

Ian: you can sort of figure out what the total overhead would be given your max 
query rate.
For example, XML had an encode rate (for this particular test) of 627 messages 
per second (on my 3GHz P4).
If you wanted 100qps, XML encoding would be taking up 16% (100/627)

Note that the overhead is particularly important for distributed search, given 
the number of messages that must be sent+received, and also the limited network 
bandwidth it must be done in.


> Support binary formats for QueryresponseWriter
> ----------------------------------------------
>
>                 Key: SOLR-486
>                 URL: https://issues.apache.org/jira/browse/SOLR-486
>             Project: Solr
>          Issue Type: Improvement
>          Components: clients - java, search
>            Reporter: Noble Paul
>            Assignee: Yonik Seeley
>             Fix For: 1.3
>
>         Attachments: SOLR-486.patch, SOLR-486.patch, SOLR-486.patch, 
> SOLR-486.patch, SOLR-486.patch, SOLR-486.patch, SOLR-486.patch
>
>
> QueryResponse writer only allows text data to be written.
> So it is not possible to implement a binary protocol . Create another 
> interface which has a method 
> write(OutputStream os, SolrQueryRequest request, SolrQueryResponse response)

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