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https://issues.apache.org/jira/browse/THRIFT-110?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12624013#action_12624013
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Noble Paul commented on THRIFT-110:
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bq.Are you suggesting that the non-homogeneous collections would only contain 
base types? 
In our case , yes. We only support basic types
But I guess it is not a fair assumption to be made on behalf of the rest of the 
community, I would assume that it must accept all the basic types + all the 
structs defined in the IDL. 
We can gradually work towards it.

bq.If non-homogenous collections are make-or-break for you ....

The types w/o wild cards *must* continue to work as it works now. The 
non-homogeneous types must be dealt as a totally different type (maybe by 
flipping a the top bits).  

> A more compact format 
> ----------------------
>
>                 Key: THRIFT-110
>                 URL: https://issues.apache.org/jira/browse/THRIFT-110
>             Project: Thrift
>          Issue Type: Improvement
>            Reporter: Noble Paul
>
> Thrift is not very compact in writing out data as (say protobuf) . It does 
> not have the concept of variable length integers and various other 
> optimizations possible . In Solr we use a lot of such optimizations to make a 
> very compact payload. Thrift has a lot common with that format.
> It is all done in a single class
> http://svn.apache.org/viewvc/lucene/solr/trunk/src/java/org/apache/solr/common/util/NamedListCodec.java?revision=685640&view=markup
> The other optimizations include writing type/value  in same byte, very fast 
> writes of Strings, externalizable strings etc 
> We could use a thrift format for non-java clients and I would like to see it 
> as compact as the current java version

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