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https://issues.apache.org/jira/browse/CASSANDRA-6933?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13958276#comment-13958276
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Jonathan Ellis commented on CASSANDRA-6933:
-------------------------------------------
v4 attached, which is v2 with the following changes:
- range initializes to size/2 which is functionally the same but conceptually
clearer
- fixed sign of range computation on bsearch match
- fix incrementing i on linear + bsearch match
- use range as pivot not 2*range (tweaking script above to demonstrate this is
better is trivial)
> Optimise Read Comparison Costs in collectTimeOrderedData
> --------------------------------------------------------
>
> Key: CASSANDRA-6933
> URL: https://issues.apache.org/jira/browse/CASSANDRA-6933
> Project: Cassandra
> Issue Type: Improvement
> Components: Core
> Reporter: Benedict
> Assignee: Benedict
> Priority: Minor
> Labels: performance
> Fix For: 2.1
>
> Attachments: 6933-v3.txt, 6933-v4.txt
>
>
> Introduce a new SearchIterator construct, which can be obtained from a
> ColumnFamily, which permits efficiently iterating a subset of the cells in
> ascending order. Essentially, it saves the previously visited position and
> searches from there, but also tries to avoid searching the whole remaining
> space if possible.
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