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https://issues.apache.org/jira/browse/CASSANDRA-7107?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13989893#comment-13989893
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Aleksey Yeschenko commented on CASSANDRA-7107:
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Only the 'invert' case, although both do still seem fine to me. Don't trust
myself much ¯\_(ツ)_/¯
> General minor tidying of CollationController path
> -------------------------------------------------
>
> Key: CASSANDRA-7107
> URL: https://issues.apache.org/jira/browse/CASSANDRA-7107
> Project: Cassandra
> Issue Type: Improvement
> Components: Core
> Reporter: Benedict
> Assignee: Benedict
> Priority: Minor
> Fix For: 2.1 rc1
>
>
> There is a lot of unnecessary boiler plate when grabbing an iterator from an
> in-memory column family. This patch:
> * Removes FakeCellName
> * Avoids wrapping a non-OnDiskAtomIterator as an OnDiskAtomIterator except
> when the wrapping is useful
> * Removes ColumnSlice.NavigableSetIterator and creates a simpler more direct
> equivalent in ABTC
> * Does not construct a SliceIterator in either ABSC or ABTC if only one slice
> is requested (just returns that slice as an Iterator)
> * Does not construct multiple list indirections in ABSC when constructing a
> slice
> * Shares forward/reverse iterators in ABSC between slices and full-iteration
> * Avoids O(N) comparisons during collation of results into an ABSC, by using
> the knowledge that all columns are provided in insertion order from a merge
> iterator
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