Github user katsiapis closed the pull request at:
https://github.com/apache/incubator-beam/pull/976
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GitHub user katsiapis opened a pull request:
https://github.com/apache/incubator-beam/pull/976
[BEAM-625] Making Dataflow Python Materialized PCollection representation
more efficient (5 of several).
Changing ToStringCoder to BytesCoder since the former can't be used with
sources
