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https://issues.apache.org/jira/browse/WSCOMMONS-179?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12481229
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Davanum Srinivas commented on WSCOMMONS-179:
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Rich,
Can't review the patch since i can't apply it to latest svn. can you please
submit a fresh diff against latest svn?
thanks,
dims
> Attachment Processing is very slow...I have a patch that provides a big
> speedup
> -------------------------------------------------------------------------------
>
> Key: WSCOMMONS-179
> URL: https://issues.apache.org/jira/browse/WSCOMMONS-179
> Project: WS-Commons
> Issue Type: Improvement
> Components: AXIOM
> Reporter: Rich Scheuerle
> Attachments: patch.txt
>
>
> This patch "kills 2 slow birds with one stone".
> ---------------------------------------------
> Slow Bird #1: MIMEBodyPartInputStream uses single byte reads.
> Solution: The patch changes MIMEBodyPartInputStream to use byte[] reads.
> ---------------------------------------------
> Slow Bird #2: MIMEBodyPartInputStream looks for the boundary using a single
> byte scan.
> Solution: The root of the problem is that we don't have a utility to
> optimize scanning for bytes....now we do (ByteSearch).
> I hoisted the byte scanning algorithm code out of
> BoundaryDelimittedInputStream and constructed an easy to use ByteSearch
> utility.
> ByteSearch uses a sophisticated "byte skipping" algorithm, which avoids
> single byte scans. Please look at this new utility.
> The second part of the solution is to simply uses the ByteSearch to search
> for the boundary. This simplification of design actually
> cleans up the code AND produces much favorable performance.
> -------------------------------------------------
> Please review the changes. I would like some feedback.
> Follow-on: May consider re-writing ByteDelimittedInputStream to use the new
> ByteSearch code.
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