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https://issues.apache.org/jira/browse/THRIFT-318?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12672164#action_12672164
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Bryan Duxbury commented on THRIFT-318:
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It's Java 1.5 compatible.
I considered binary searching the extents, but like you said, the common case
is only one extent. I guess if you had a very disjoint set of values for a
given enumeration, doing a binary search might be kind of nice. I think we
should cross that bridge when someone shows up with the use case, though.
> Performance of HashSet for enumeration VALID_VALUES seems poor
> --------------------------------------------------------------
>
> Key: THRIFT-318
> URL: https://issues.apache.org/jira/browse/THRIFT-318
> Project: Thrift
> Issue Type: Improvement
> Components: Compiler (Java)
> Reporter: Bryan Duxbury
> Assignee: Bryan Duxbury
> Priority: Minor
> Fix For: 0.1
>
> Attachments: thrift-318.patch
>
>
> It looks like using a HashSet for the VALID_VALUES set we now put in
> enumerated types was a bad move, performance-wise. There's a fair amount of
> HashSet/HashMap/Integer overhead generated.
> I think that the VALID_VALUES should still be a Set, but we can make a
> TIntRangeSet or something internal to Thrift that's more efficient for our
> usecases and save some CPU.
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