[sqlite] query Benchmark

[Michele Pradella]

Hi all, is there a way to make a benchmark of queries to check which 
version is faster? I'm using sqlite shell, the question is about on how 
to make repetitive tests in the same conditions (for example I need to 
totally disable cache to avoid different results the second time query 
is executed).
I try to explain better: the same query re-arranged in two different 
queries to check which is the faster, executed on the same DB, how can I 
do speed check of those queries avoiding interaction between two 
queries(example cache)?