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https://issues.apache.org/jira/browse/THRIFT-753?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Bryan Duxbury updated THRIFT-753:
---------------------------------

    Attachment: thrift-753.patch

This patch switches to a switch statement-based lookup. A micro benchmark shows 
that this new approach is about 10x as fast as the other. This doesn't 
translate to much of a macro improvement in deserialization, but it does 
certainly eliminate it outright.

> Don't look up TFieldIdEnum values with a map
> --------------------------------------------
>
>                 Key: THRIFT-753
>                 URL: https://issues.apache.org/jira/browse/THRIFT-753
>             Project: Thrift
>          Issue Type: Improvement
>          Components: Compiler (Java)
>    Affects Versions: 0.3
>            Reporter: Bryan Duxbury
>            Assignee: Bryan Duxbury
>             Fix For: 0.3
>
>         Attachments: thrift-753.patch
>
>
> Each struct's internal _Fields class currently generates and uses a HashMap 
> to allow lookup of enum values by thrift field id. This can be a bit slow - 
> it requires us to box an Integer, then hash it, then perform the lookup. We 
> can probably get by with generating a case statement.

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