[jira] Resolved: (JCR-2914) Copying data from inputStream to OuputStream needs appropriate buffer size

["Stefan Guggisberg (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/JCR-2914?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Stefan Guggisberg resolved JCR-2914.
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    Resolution: Won't Fix

> We need to find an appropriate buffer size based on the size of the InputStream. 

IOUtil is a generic utility class. InputStream doesn't provide information about the size of the underlying data. 

i suggest you wrap your stream in a buffering input stream. 

> Copying data from inputStream to OuputStream needs appropriate buffer size
> --------------------------------------------------------------------------
>
>                 Key: JCR-2914
>                 URL: https://issues.apache.org/jira/browse/JCR-2914
>             Project: Jackrabbit Content Repository
>          Issue Type: Improvement
>          Components: jackrabbit-jcr-server
>    Affects Versions: 2.2.2
>            Reporter: Xiaoming Shi
>            Priority: Minor
>
> In the file:
> ./jackrabbit-2.2.2/jackrabbit-jcr-server/src/main/java/org/apache/jackrabbit/server/io/IOUtil.java   line:80
> The buffer size is fixed as 8192.
> To copy 10M data with 8192-byte buffer it takes 98,905,252 nano-second, while it takes 37,642,842 nano-second with a 81920-byte buffer
> We need to find an appropriate buffer size based on the size of the InputStream.
> This is similar to the Apache Bug:https://issues.apache.org/bugzilla/show_bug.cgi?id=32546

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