Github user marmbrus commented on the issue:
https://github.com/apache/spark/pull/15962
Do you have any performance comparisons to show that we need to do this?
On the driver, I think we want it to be as small as possible, because we
don't want to pull any data down (it would be even better if we could just
issue a raw ListOffsets request). On the executors, we should know exactly how
many offsets we need to pull down, so I'm not sure it make sense to allow users
to configure this.
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