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Posted to dev@avro.apache.org by "Joseph Adler (JIRA)" <ji...@apache.org> on 2013/02/01 21:40:14 UTC

[jira] [Updated] (AVRO-1241) improve trevni performance on string deserialization

     [ https://issues.apache.org/jira/browse/AVRO-1241?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Joseph Adler updated AVRO-1241:
-------------------------------

    Release Note: Optimized string de-serialization
          Status: Patch Available  (was: Open)
    
> improve trevni performance on string deserialization
> ----------------------------------------------------
>
>                 Key: AVRO-1241
>                 URL: https://issues.apache.org/jira/browse/AVRO-1241
>             Project: Avro
>          Issue Type: Improvement
>          Components: java
>    Affects Versions: 1.7.3
>            Reporter: Joseph Adler
>
> I have been trying to implement a storage function for Apache Pig that writes data in Trevni format. I found that the storage function was very slow when reading whole records.
> I did some profiling (with Yourkit) and found that most of the CPU time was being spent in org.apache.trevni.InputBuffer$readString() (specifically in the String() method). I changed to java.nio.charset.CharsetDecoder.decode for deserialization and saw a big improvement. Changes are included in the patch.

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