Avoid slow Class.forName when serializing lambdas
#944
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This PR improves the performance of
ClosureSerializerby avoiding calls toClass.forNamewhenever possible.The change requires a reflective call to a private field in
SerializedLambda, but since we already reflect into this class to get access to thereadResolvemethod, I don't think this is an issue.The new implementation is 2.5-3x faster:
28160031134271