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https://issues.apache.org/jira/browse/AVRO-383?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12805619#action_12805619
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Doug Cutting commented on AVRO-383:
-----------------------------------
Another way to implement ResolvingParserGenerator.java::encode() might be to
call GenericData#defaultFieldValue() then use GenericDatumWriter to encode this
as binary. This might be a bit slower, but it would use a lot less code, and
this is done at schema-compilation time, so shouldn't be too performance
critical.
> Optiminzing ResolvingDecoder for default values
> -----------------------------------------------
>
> Key: AVRO-383
> URL: https://issues.apache.org/jira/browse/AVRO-383
> Project: Avro
> Issue Type: Improvement
> Components: java
> Reporter: Thiruvalluvan M. G.
> Assignee: Thiruvalluvan M. G.
> Attachments: AVRO-383-test.patch, AVRO-383.patch
>
>
> When the reader's and writer's schemas are records and the reader's schema
> has a field with default value and the writer's schema doesn't have the
> field, the ResolvingDecoder keeps the default value in a byte array. This
> byte array is in Json format. Moving this to Avro binary format improves
> performance.
> Apply the test patch and try "Perf -M". Then apply the patch and run it
> again. On my machine, the performance is three times the original.
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