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Posted to dev@avro.apache.org by "ASF GitHub Bot (JIRA)" <ji...@apache.org> on 2018/11/07 15:03:00 UTC
[jira] [Commented] (AVRO-2247) Improve Java reading performance
with a new reader
[ https://issues.apache.org/jira/browse/AVRO-2247?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16678347#comment-16678347 ]
ASF GitHub Bot commented on AVRO-2247:
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Fokko commented on issue #354: AVRO-2247 - improved java reading performance with new reader
URL: https://github.com/apache/avro/pull/354#issuecomment-436652418
Can you rebase and fix the merge conflict?
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> Improve Java reading performance with a new reader
> --------------------------------------------------
>
> Key: AVRO-2247
> URL: https://issues.apache.org/jira/browse/AVRO-2247
> Project: Avro
> Issue Type: Improvement
> Components: java
> Reporter: Martin Jubelgas
> Priority: Major
> Fix For: 1.9.0
>
> Attachments: Perf-Comparison.md
>
>
> Complementary to AVRO-2090, I have been working on decoding of Avro objects in Java and am suggesting a new implementation of a DatumReader that improves read performance for both generic and specific records by approximately 20% (and even more in cases of nested objects with defaults, a case I encounter a lot in practical use).
> Key concept is to create a detailed execution plan once at DatumReader. This execution plan contains all required defaulting/lookup values so they need not be looked up during object traversal while reading.
> The reader implementation can be enabled and disabled per GenericData instance. The system default is set via the system variable "org.apache.avro.fastread" (defaults to "false").
> Attached a performance comparison of the existing implementation with the proposed one. Will open a pull request with respective code in a bit (not including interoperability with the optimizations of AVRO-2090 yet). Please let me know your opinion of whether this is worth pursuing further.
>
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