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https://issues.apache.org/jira/browse/CASSANDRA-9988?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16099288#comment-16099288
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Jay Zhuang commented on CASSANDRA-9988:
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hi [~benedict] I also added tests for different cellSize: 36, 100, 1k and 10K
(they're generated from random UUID.tostring()). In the graph above, they're
corresponding to 4 data points in each bTree size section. We don't see a
significant difference between them. For example {{IteratorTree}}, the first 4
data points are the ones for one-node-BTree with different cellSize, they have
the similar improvements (+800%), maybe here is better graph:
!9988-result2.png|result!
> Introduce leaf-only iterator
> ----------------------------
>
> Key: CASSANDRA-9988
> URL: https://issues.apache.org/jira/browse/CASSANDRA-9988
> Project: Cassandra
> Issue Type: Sub-task
> Reporter: Benedict
> Assignee: Jay Zhuang
> Priority: Minor
> Labels: patch
> Fix For: 4.0
>
> Attachments: 9988-data.png, 9988-result2.png, 9988-result.png,
> 9988-trunk-new.txt, 9988-trunk-new-update.txt, trunk-9988.txt
>
>
> In many cases we have small btrees, small enough to fit in a single leaf
> page. In this case it _may_ be more efficient to specialise our iterator.
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