Improve the performance of hash joins on Flotilla when inputs only have 1 partition #5127
Description
Is your feature request related to a problem?
Since Daft 0.5.10, Flotilla supports hash joins by repartitioning both sides and performing local joins. This brings about benefits (since Flotilla can now be used) but introduces overheads in cases where the shuffle is unnecessary (e.g., when inputs only have a single partition).
Describe the solution you'd like
Elide shuffles when inputs only have 1 partition.
Describe alternatives you've considered
No response
Additional Context
No response
Would you like to implement a fix?
No