Hi Ivan,
Just to add up to chaining: When splitting the map into two parts, objects
need to be copied from one operator to the chained operator. Since your
objects are very heavy that can take quite long, especially if you don't
have a specific serializer configured but rely on Kryo.
You can avoi
Generally there should be no difference.
Can you check whether the maps are running as a chain (as a single task)?
If they are running in a chain, then I would suspect that /something/
else is skewing your results.
If not, then the added network/serialization pressure would explain it.
I will a
