facebook/presto — pull request #1194 by rishidwivedi (2014-04-14 02:11:05+00:00)
Title: Reuse pre computed partitionDomainSummary

PartitionDomainSummary computation is an expensive operation(250ms for 12k partitions). Instead of computing it every time a new instance of TableScanNode is created, we can use pre computed partitionDomainSummary value.