Remove one GroupBy ad one Sort, more than twice as fast. Stage #3 is still much too large for reasons unknown (complains about ".count()" but there is no counting in my code OOM errors still present, possibly in later (post-pipe) stages.
Remove one GroupBy ad one Sort, more than twice as fast.
Stage #3 is still much too large for reasons unknown (complains about ".count()" but there is no counting in my code
OOM errors still present, possibly in later (post-pipe) stages.

usc-isi-i2/dig-crf,usc-isi-i2/dig-crf