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https://issues.apache.org/jira/browse/AVRO-2281?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16711848#comment-16711848
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ASF GitHub Bot commented on AVRO-2281:
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kphelps opened a new pull request #401: [AVRO-2281] Optimize ruby binary
encoder/decoder
URL: https://github.com/apache/avro/pull/401
This makes some performance improvements around unpacking strings and
freezing some strings that cause a lot of unnecessary allocations in some
cases. We can also take advantage of `unpack1` when running in a version of
ruby that supports it.
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> Performance improvement in ruby binary decoder and encoder
> ----------------------------------------------------------
>
> Key: AVRO-2281
> URL: https://issues.apache.org/jira/browse/AVRO-2281
> Project: Apache Avro
> Issue Type: Improvement
> Components: ruby
> Affects Versions: 1.9.0
> Reporter: Kyle Phelps
> Priority: Minor
>
> The ruby binary decoder has some inefficient memory usage patterns. The
> decoding process relies on `unpack` quite heavily, but it allocates an array
> that is not used as we just access the first element of the result. In ruby
> 2.4 we can use the optimized version of this, `unpack1` which avoids
> allocating the unused array. In `byte!`, we can go one step further and just
> use the `readbyte` method provided by the IO module - this improves the
> performance of `byte!` by about 50%. Additionally, there are a few strings in
> the encoder and decoder that should be frozen to reduce unnecessary string
> allocations.
>
> With these changes, I've seen about a 20% performance improvement when
> decoding.
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