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https://issues.apache.org/jira/browse/THRIFT-10?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12597374#action_12597374
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Johan Stuyts commented on THRIFT-10:
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I sent a patch to the mailing list:
http://publists.facebook.com/pipermail/thrift/2008-May/001006.html
As can be read in the post this is a partial patch as it only made the
descriptors immutable. The descriptors are still created for each use. Another
patch will have to change the object creations to constant instances.
> Descriptors used during serialization should be immutable objects
> -----------------------------------------------------------------
>
> Key: THRIFT-10
> URL: https://issues.apache.org/jira/browse/THRIFT-10
> Project: Thrift
> Issue Type: Improvement
> Components: Library (Java)
> Reporter: Johan Stuyts
> Priority: Minor
>
> The descriptors for structures, messages, types, etc. in package
> {{com.facebook.thrift.protocol}} which are used during (de-)serialization
> have mutable attributes. This forces the creation of these descriptors for
> each use even if the data is constant in many cases.
> By changing the descriptors to be immutable, structures and protocols can use
> singleton, constant instances during (de-)serialization. This will improve
> performance a bit by preventing the creation of hundreds (thousands?) of
> short-lived objects per second during heavy use of Thrift.
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