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https://issues.apache.org/jira/browse/MAILBOX-198?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13724304#comment-13724304
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Eric Charles commented on MAILBOX-198:
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I tried to apply MAILBOX-198.patch on trunk but got rejections. Can you double
check and resubmit a rebased patch if needed? Thx a lot.
> Improve SimpleMessageSearchIndex performance
> --------------------------------------------
>
> Key: MAILBOX-198
> URL: https://issues.apache.org/jira/browse/MAILBOX-198
> Project: James Mailbox
> Issue Type: Improvement
> Reporter: Jan-Philipp Niewerth
> Labels: PatchAvailable
> Attachments: MAILBOX-198.patch
>
>
> SimpleMessageSearchIndex has O(n^2) performance for searches at the moment.
> This leads to very bad message check performance for e.g the Android
> Mailclient on big mailboxes.
> The reason for that is that the current code buffers messages in an ArrayList
> while performing an contains() check before each add(). A TreeSet is more
> appropriate here reducing runtime to O(n*log(n)).
> Furthermore the existing UID range optimization is not effective when other
> criteria are conjugated with the query.
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