bsddb3:
 Time elapsed: 6.046273s
 Cache hits: 1260,  misses 217.
 Loading items: 0.195180 secs.
 Filtering: 5.293255 secs.

anydbm:
 Time elapsed: 0.842243s
 Cache hits: 1289,  misses 217.
 Loading items: 0.109195 secs.
 Filtering: 0.201656 secs.

sqlite:
 Time elapsed: 0.834586s
 Cache hits: 701,  misses 64.
 Loading items: 0.162177 secs.
 Filtering: 0.007186 secs.

