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https://issues.apache.org/jira/browse/AVRO-1277?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13609175#comment-13609175
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Leo Romanoff commented on AVRO-1277:
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I attach a first version of my patch. It is just to explain the idea.
Formatting and other issues can be solved later.
What this patch does:
- It caches using thread-local cache classes that were looked up before
- It caches using thread-local cache fields of classes that were determined
before using reflection
- It provides a more efficient way to work with arrays of primitive types,
because working with arrays using reflection is quite slow
- It adds support for Character fields in Java classes, because it was not
supported for some reason. It has nothing to do with reflection ;-) I just
needed it and added support in a way similar to how "short" class is handled.
This change touches the same classes that reflection changes though. If you
don't like it or want it to be a separate patch, I could submit it separately
later
-Leo
> Improve performance of reflection-based serializers
> ---------------------------------------------------
>
> Key: AVRO-1277
> URL: https://issues.apache.org/jira/browse/AVRO-1277
> Project: Avro
> Issue Type: Improvement
> Components: java
> Affects Versions: 1.7.4
> Reporter: Leo Romanoff
> Priority: Minor
>
> I've played a bit with Avro serialization based on reflection, i.e. with the
> classes from org.apache.avro.generic package.
> It works fine in this mode, but is rather slow compared to such frameworks
> like protostuff or kryo.
> Quick look at the source code has shown that a lot of reflection-based
> operations and class lookups are not cached. And such operations are usually
> pretty expensive when executed by a JVM.
> So I changed some of org.apache.avro.generic classes, introduced caching and
> a few other optimizations. Now it seems to perform much better.
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