Github user JDrit commented on the pull request:
https://github.com/apache/spark/pull/7004#issuecomment-115393908
I wrote some benchmarking code for
[this](https://github.com/JDrit/avro_tests/tree/master) and the results are
recorded
[here](https://docs.google.com/a/cloudera.com/spreadsheets/d/16JXO80O1Fh9bTIhx_0PZcCd5gvGTobX6xoe17vBEGH0/edit?usp=sharing).
tl;dr:
The compression on the schema is still useful in both wall time and network
IO. Currently generic records use a lot of network, and using this new
serializer greatly cuts down on network usage. Registering schemas ahead of
time also helps a lot.
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