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From "Branimir Lambov (JIRA)" <uima-...@incubator.apache.org>
Subject [jira] Issue Comment Edited: (UIMA-1366) Binary heap annotation iterator implementation
Date Wed, 03 Jun 2009 09:10:07 GMT

    [ https://issues.apache.org/jira/browse/UIMA-1366?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12715876#action_12715876
] 

Branimir Lambov edited comment on UIMA-1366 at 6/3/09 2:09 AM:
---------------------------------------------------------------

Updated patch with the latest version (two unnecessary validity checks removed from is_before).

      was (Author: barnie):
    Removed two unnecessary validity checks.
  
> Binary heap annotation iterator implementation
> ----------------------------------------------
>
>                 Key: UIMA-1366
>                 URL: https://issues.apache.org/jira/browse/UIMA-1366
>             Project: UIMA
>          Issue Type: Improvement
>          Components: Core Java Framework
>            Reporter: Branimir Lambov
>         Attachments: BinaryHeapIteratorPatch.txt
>
>
> The attached patch is a logarithmic complexity implementation of FSIndexRepositoryImpl.PointerIterator.
The implementation maintains a binary heap of indexes and a short sorted section before the
start of the heap to avoid spending more time than the old UIMA iterator when a couple of
types completely dominate the heap.
> It offers small advantage when iterating over a small number of types and should be significantly
faster for large numbers of types, as well as in situations where moveToNext() is not the
only operation used on the iterator.

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