Aria Presto: Making table scan more efficientAria is a set of initiatives to dramatically increase PrestoDB efficiency. Our goal is to achieve a 2-3x decrease in CPU time for Hive queries against tables stored in ORC format. For Aria, we are pursuing improvements in three areas: table scan, repartitioning (exchange, shuffle), and hash join. Nearly 60 percent of our global Presto CPU time is attributed to table scan, making scan improvements
