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From "Doug Cutting (Created) (JIRA)" <j...@apache.org>
Subject [jira] [Created] (AVRO-911) remove object reuse from Java APIs
Date Wed, 05 Oct 2011 23:16:29 GMT
remove object reuse from Java APIs

                 Key: AVRO-911
                 URL: https://issues.apache.org/jira/browse/AVRO-911
             Project: Avro
          Issue Type: Improvement
          Components: java
            Reporter: Doug Cutting
            Assignee: Doug Cutting
             Fix For: 1.6.0

Avro's Java APIs were designed to permit object reuse when reading with the assumption that
would provide performance advantages.  In particular, the old parameter in DatumReader<T>.read(T
old, Decoder), the Utf8 class, and the GenericArray.peek() method were all designed for this
purpose.  But I am unable to see significant performance improvements when objects are reused.
 I tried modifying Perf.java's GenericTest to reuse records, and its StringTest to not reuse
Utf8 instances and, in both cases, performance is not substantially altered.

If we were to remove these then issues such as AVRO-803 would disappear.  Always using java.lang.String
instead of Utf8 would remove a lot of user confusion. 

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