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From "Sebb (Commented) (JIRA)" <>
Subject [jira] [Commented] (IO-286) FastByteArray*Stream implementations to replace syncronized JDK ByteArray*Stream
Date Thu, 01 Mar 2012 18:09:58 GMT


Sebb commented on IO-286:

Why is there an additional protected method:

protected void writeBytes(byte[] b, int off, int len)

This is not present in ByteArrayOutputStream.

Also, what about FastByteArrayInputStream - is that not needed?
> FastByteArray*Stream implementations to replace syncronized JDK ByteArray*Stream
> --------------------------------------------------------------------------------
>                 Key: IO-286
>                 URL:
>             Project: Commons IO
>          Issue Type: New Feature
>          Components: Streams/Writers
>            Reporter: Paul Loy
>            Priority: Minor
>              Labels: streams, synchronized
>         Attachments: FastByteArrayOutputStream_commons-io.patch, FastByteArrayOutputStream_commons-io[2].patch
>   Original Estimate: 24h
>  Remaining Estimate: 24h
> In CASSANDRA-2820 I reintoduced the FastByteArrayInputStream and FastByteArrayOutputStream
to cassandra. These steams are un-synchronized versions of the Apache Harmony ByteArrayInputStream
and ByteArrayOutputStream respectively.
> During my own testing of the streams I found a big difference in the performance of the
standard JDK BA*S steams and the FBA*S streams on most JREs. Then cassandra load testing also
showed an up to 10% improvement in cassandra performance using these streams.
> Then Thrift has TByteArrayOutputStream which contains a way to get the underlying byte[]
buffer without a deep copy that would probably be a good further enhancement.
> Patch to follow.

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