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https://issues.apache.org/jira/browse/AVRO-2090?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16654739#comment-16654739
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Raymie Stata commented on AVRO-2090:
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I've attached my two runs of Perf.java combined into a single file
([^perf-data.txt]). The first four columns of numbers in this file are the
results with custom-encoders turned off; the next four columns are the results
with custom-encoders on.
For the two SpecificRecord cases: On my machine, FooBarSpecificRecordTestWrite
improved 36% (from 3577 ms to 2296 ms), while FooBarSpecificRecordTestRead
improved 12% (4728 ms to 4130 ms). It's not surprising that the read case
improved less: the overhead of accommodating schema migration is high. I have
some ideas on how improve performance even more, esp. for the read case. That
said, a >10% improvement is not bad, and 36% improvement is quite good, so I
suggest we commit this change as-is and save further improvements to future
patches.
> Improve encode/decode time for SpecificRecord using code generation
> -------------------------------------------------------------------
>
> Key: AVRO-2090
> URL: https://issues.apache.org/jira/browse/AVRO-2090
> Project: Avro
> Issue Type: Improvement
> Components: java
> Reporter: Raymie Stata
> Assignee: Raymie Stata
> Priority: Major
> Attachments: customcoders.md, perf-data.txt
>
>
> Compared to GenericRecords, SpecificRecords offer type-safety plus the
> performance of traditional getters/setters/instance variables. But these are
> only beneficial to Java code accessing those records. SpecificRecords
> inherit serialization and deserialization code from GenericRecords, which is
> dynamic and thus slow (in fact, benchmarks show that serialization and
> deserialization is _slower_ for SpecificRecord than for GenericRecord).
> This patch extends record.vm to generate custom, higher-performance encoder
> and decoder functions for SpecificRecords. We've run a public benchmark
> showing that the new code reduces serialization time by 2/3 and
> deserialization time by close to 50%.
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