Github user StephanEwen commented on the pull request:
https://github.com/apache/incubator-flink/pull/113#issuecomment-54808599
An improvement here could be to unify the detection whether a UDF is a
lambda, and the type extraction. Right now, we look up the `writeReplace`
method and check for serialized lambda twice - once for detection, once for
extraction.
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