Table 1.

Execution Times (in Seconds) for Query 1: “Find All Patients with Cultures Positive for Pseudomonas aeruginosa”

	EAV/CR-Small			EAV/CR-Big
	Anc	NoAnc	Conv-Small	Anc	NoAnc	Conv-Big
64-Mb RAM:
Initial query	29.5	29.5	8.2	97.6	147	29.2
Cached	21.6	20.2	3.6	90.6	140	10.8
128-Mb RAM:
Initial query	30.2	28.9	8.2	97.3	108	26.2
Cached	7.8	11.6	3.7	98.4	98.4	10.2
Note: Times for EAV/CR schema are displayed with and without ancestor construct. Anc indicates ancestor; NoAnc, no ancestor.