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https://issues.apache.org/jira/browse/HADOOP-6532?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12828807#action_12828807
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Tsz Wo (Nicholas), SZE commented on HADOOP-6532:
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> Is it possible to keep the Path object, but avoid materializing the fields? 
Yes, we only have to get rid of Path.uri.

> Another alternative might be to have Path, like String, contain only a 
> char[]....
That's correct.  char[] is better than String.

> Path objects are heavy
> ----------------------
>
>                 Key: HADOOP-6532
>                 URL: https://issues.apache.org/jira/browse/HADOOP-6532
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: fs
>            Reporter: Tsz Wo (Nicholas), SZE
>         Attachments: Fun.java
>
>
> Compared with java.lang.String, org.apache.hadoop.fs.Path is much heavier 
> since it contains URI.  The size of a Path is roughly 3 times of a String.  
> See some numbers in the comments.
> A major impact of decreasing Path size is allowing ls, archive, etc. on 
> directories with many files.

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