Help learning from my mistakes

Kristof Provost kristof at sigsegv.be
Sun Apr 5 08:29:47 EDT 2015


On 2015-04-05 01:15:31 (-0400), Valdis.Kletnieks at vt.edu <Valdis.Kletnieks at vt.edu> wrote:
> On Sat, 04 Apr 2015 19:00:42 -0400, Nicholas Krause said:
> >  are now slower by up to 3 times,
> 
> So what debugging did you already do to try to narrow this down?
>
While we're on the subject, let me indulge a pet peeve: How did you
measure this? Can you reproduce the measurement? Is the difference
statistically significant? What aspect of performance is worse? Task
switching time? IO throughput?

Benchmarking is *hard*, and 'up to 3 times' is not the result of a
careful, well thought out benchmark.

Regards,
Kristof



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