Re: usleep feature for pgbench

Alvaro Herrera <alvherre@commandprompt.com> writes:
> Tom Lane wrote:
>> Did you check that the observed performance for non-usleep-using scripts
>> didn't change?  If this extra overhead causes a reduction in reported
>> TPS rates it would make it hard to compare older and newer tests.

> I keep wondering, why is that important?  If you want to compare results
> of different PG versions, surely you can run the tests with the newest
> version of pgbench?

It's more about not having to repeat old test cases every time you want
to have numbers comparable to your latest case.
        regards, tom lane