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https://issues.apache.org/jira/browse/CASSANDRA-9988?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16097163#comment-16097163
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Benedict commented on CASSANDRA-9988:
-------------------------------------
So, for the record, I wasn't suggesting a huge tree (since these should by
definition be unaffected by the patch, as they shouldn't ever use the leaf
iterator), but a larger _corpora_ of trees so it cannot be guaranteed the trees
and/or their datums are in at least L1/L2 cache (and perhaps, for comparison,
L3+).
> 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-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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