Kyle Phelps created AVRO-2281:
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Summary: 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
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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