If it makes you feel better (worse?), even the big guys do this; I recall reading SAP HANA marketing materials which did a similar thing to OP[0]. With enough p

If it makes you feel better (worse?), even the big guys do this; I recall reading SAP HANA marketing materials which did a similar thing to OP[0]. With enough precomputation and knowing which data to skip, you too can achieve better than linear performance; though at least they aren't suggesting they are churning through the entire dataset in a few seconds. [0] http://www54.sap.com/content/dam/site/sapcom/global/usa/en_us/assetmgt/docs/2012/08-aug/27/09/sap-hana-performance.pdf http://www54.sap.com/content/dam/site/sapcom/global/usa/en_u...