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https://issues.apache.org/jira/browse/IO-305?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13231869#comment-13231869
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Manoj Mokashi commented on IO-305:
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In my humble opinion, the buffer size parameter is important to control
performance,
the default buffer size is 4096, and for large files we would need more. If
copyLarge should not accept a buffer size parameter,
maybe we should use the copy method. Is the check for len == -1 really a
performance issue, especially since we don't read byte-by-byte ?
> New copy() method in IOUtils that takes additional offset, length and
> buffersize arguments
> ------------------------------------------------------------------------------------------
>
> Key: IO-305
> URL: https://issues.apache.org/jira/browse/IO-305
> Project: Commons IO
> Issue Type: New Feature
> Components: Utilities
> Reporter: Manoj Mokashi
> Priority: Minor
> Fix For: 2.2
>
> Attachments: IOUtils.java, IOUtilsTest.java
>
>
> /**
> * Copy from input to output stream
> * @param is : input stream
> * @param os : output stream
> * @param offset : number of bytes to skip from input before copying
> * -ve values are ignored
> * @param len : number of bytes to copy. -1 means all
> * @param bufferSize : buffer size to use for copying
> * @throws IOException
> */
> public static void copy( InputStream is, OutputStream os, int offset, int
> len, int bufferSize) throws IOException
>
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