[
https://issues.apache.org/jira/browse/LANG-839?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13472457#comment-13472457
]
Sebb commented on LANG-839:
---------------------------
URL: http://svn.apache.org/viewvc?rev=1395943&view=rev
Log:
LANG-839 Add tests to compare extractIndices+removeAll with direct use of
BitSet in new version of removeAll
Modified:
commons/proper/lang/trunk/src/main/java/org/apache/commons/lang3/ArrayUtils.java
commons/proper/lang/trunk/src/test/java/org/apache/commons/lang3/HashSetvBitSetTest.java
> ArrayUtils removeElements methods use unnecessary HashSet
> ---------------------------------------------------------
>
> Key: LANG-839
> URL: https://issues.apache.org/jira/browse/LANG-839
> Project: Commons Lang
> Issue Type: Improvement
> Components: lang.*
> Affects Versions: 3.1
> Reporter: Sebb
> Priority: Minor
> Fix For: 3.2
>
> Attachments: LANG-839.patch
>
>
> The removeElements() methods use a HashSet to collect the indexes that need
> removing.
> This requires creating Integer objects for each index, and the HashSet then
> has to be converted into an int[] array.
> It would be more efficient to store the entries in an actual int[] array.
> The maximum size of this is the length of the values array (or the length of
> the input array if that is shorter).
> The array must be truncated before calling the private removeAll() method;
> this can be done with Arrays.copyOf(x[], length).
> However, if the arrays are very large, and most of the values do not appear
> in the input, this might result in using more memory than the HashSet
> implementation.
--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators
For more information on JIRA, see: http://www.atlassian.com/software/jira
