Avoid double copying data in ChannelDescriptor#read()
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Key: JRUBY-2423
URL: http://jira.codehaus.org/browse/JRUBY-2423
Project: JRuby
Issue Type: Improvement
Reporter: Wayne Meissner
Assignee: Thomas E Enebo
Priority: Trivial
Attachments: ChannelDescriptor.patch
ChannelDescriptor#read currently reads into a temporary ByteBuffer, then copies
that into the ByteList.
For the optimistic case - where read() will read the requested number of bytes
- reading directly into the ByteList avoids one copy.
Where read returns -1 or 0, this patch results in a superfluous allocation and
(maybe) arraycopy.
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