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https://issues.apache.org/jira/browse/AVRO-383?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Thiruvalluvan M. G. reopened AVRO-383:
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The patch is incomplete:
- The skip operation still uses the JSonDecoder. Probably, this problem
will never be caught because the default values will never be skipped - the
default value come into play when the reader wants it and the writer doesn't
have it. Skip happens when the situation is the other way around - writer has
it and reader doesn't want it. Nevertheless, the API allows skip of default
values, we should fix it.
- With the Json decoder gone, DefaultStartAction no longer needs the the
field "root".
The new patch fixes both the problems.
> 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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