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Posted to commits@wicket.apache.org by "Carl-Eric Menzel (JIRA)" <ji...@apache.org> on 2012/05/07 17:04:51 UTC
[jira] [Resolved] (WICKET-4524) ListMultipleChoice has a
performance issue with very large lists, patch included
[ https://issues.apache.org/jira/browse/WICKET-4524?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Carl-Eric Menzel resolved WICKET-4524.
--------------------------------------
Resolution: Fixed
Fix Version/s: 1.5.7
6.0.0-RC1
> ListMultipleChoice has a performance issue with very large lists, patch included
> --------------------------------------------------------------------------------
>
> Key: WICKET-4524
> URL: https://issues.apache.org/jira/browse/WICKET-4524
> Project: Wicket
> Issue Type: Improvement
> Components: wicket
> Affects Versions: 1.4.20
> Reporter: Martin Makundi
> Assignee: Carl-Eric Menzel
> Priority: Minor
> Labels: performance
> Fix For: 6.0.0-RC1, 1.5.7
>
> Attachments: patch.txt
>
> Original Estimate: 0.25h
> Remaining Estimate: 0.25h
>
> If ListMultipleChoice has thousands of options, the convertChoiceIdsToChoices method will become a performance bottleneck because it has a O(N^2) algorithm for determining the selected items. This patch suggests an optimization using a HashMap which will have a performance improvement in cases of large choices lists (users typically 'select all' in such situation).
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