[ http://issues.apache.org/jira/browse/IO-97?page=all ]
Henri Yandell updated IO-97:
----------------------------
Fix Version/s: 1.4
The diff is relatively involved, and as 1.3 looks pretty close I figure this
will be looked at for the subsequent 1.4 release.
> Trivial performance improvements to ByteArrayOutputStream
> ---------------------------------------------------------
>
> Key: IO-97
> URL: http://issues.apache.org/jira/browse/IO-97
> Project: Commons IO
> Issue Type: Improvement
> Components: Streams/Writers
> Affects Versions: 1.2
> Reporter: Holger Hoffstätte
> Fix For: 1.4
>
> Attachments: BAOS.patch
>
>
> Found a few trivial ways to improve performance in ByteArrayOutputStream by
> fast paths:
> - write(int) does not have to be synchronized
> - write(byte[]..) does not have to be synchronized as a whole either; it's
> enough to synchonize the code that follows the first paramter-checking
> if-then statement (so parameter checks can pop out quickly)
> - toByteArray() could just check if count == 0 and quickly return an empty
> static final byte[] instead of returning a new zero-sized one, doing useless
> System.arraycopy() etc.
> A somewhat more involved optimization would be to implement write(int)
> without the new byte[1] since just poking the byte into the right page is
> going to be much faster than what happens in write(byte[]..); I'll see if I
> can do a patch for that.
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