Performance Difference in comparing integers and comparing strings

Question

Can anyone provide any concrete evidence of performance when comparing

int = int

and:

string = string

in

Answer 1

Comparing integers should be faster, at the very low level it will end up with 1 cmp instruction. Comparing string involves more instructions, and as a result, worse performance.
I assume you either have or don't have indexes on both fields, indexes are equally selective, number of records also the same