[jira] [Created] (MAILBOX-198) Improve SimpleMessageSearchIndex performance

["Jan-Philipp Niewerth (JIRA)" <ji...@apache.org>]

Jan-Philipp Niewerth created MAILBOX-198:
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             Summary: 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


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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