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https://issues.apache.org/jira/browse/PARQUET-74?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Julien Le Dem resolved PARQUET-74.
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Resolution: Duplicate
Fix Version/s: 1.6.0
Assignee: Zhenxiao Luo
Thanks for submitting a patch.
This has been merged in
https://github.com/apache/incubator-parquet-mr/pull/40
> Use thread local decoder cache in Binary toStringUsingUTF8()
> ------------------------------------------------------------
>
> Key: PARQUET-74
> URL: https://issues.apache.org/jira/browse/PARQUET-74
> Project: Parquet
> Issue Type: Improvement
> Components: parquet-mr
> Reporter: Zhenxiao Luo
> Assignee: Zhenxiao Luo
> Fix For: 1.6.0
>
>
> In Binary toStringUsingUTF8(), new String(...) is slower because it
> instantiates a new Decoder, while Charset#decode uses a thread-local decoder
> cache, it is much faster.
> ByteArraySliceBackedBinary is using Charset#decode, while,
> ByteArrayBackedBinary and ByteBufferBackedBinary are still using new String()
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