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From "Martin Desruisseaux (JIRA)" <j...@apache.org>
Subject [jira] [Created] (SIS-306) Improve performance of ChannelDataInput.readBits(int)
Date Fri, 27 Nov 2015 16:48:10 GMT
Martin Desruisseaux created SIS-306:
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             Summary: Improve performance of ChannelDataInput.readBits(int)
                 Key: SIS-306
                 URL: https://issues.apache.org/jira/browse/SIS-306
             Project: Spatial Information Systems
          Issue Type: Improvement
          Components: Storage
    Affects Versions: 0.6, 0.5, 0.4, 0.3
            Reporter: Martin Desruisseaux
            Priority: Minor


Profiling shows that reading of compressed file formats spend a lot of time in {{ChannelDataInput.readBits(int)}}.
We may try to improve performance by replacing all calls to {{readByte()}} and {{readUnsignedByte()}}
is that method by calls to {{buffer.get()}}. But before, we need to invoke {{ensureBufferContains(int)}}.
However we will try to invoke the later method only once, instead than at each call of {{readByte()}}.



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