On Aug 9, 3:37 am, John Harrop <jharrop...@gmail.com> wrote:
> On Sun, Aug 9, 2009 at 3:06 AM, Andy Fingerhut <
>
> andy_finger...@alum.wustl.edu> wrote:
> > I did two runs for each version, with the only difference between them
> > being replacing the (zero? i) expression in function 'dot' with a
> > different expression, as indicated below. (zero? i) is a clear winner
> > in reducing run time.
>
> That's very surprising. Were you using -server in the vm options? It seems
> to me that (= 0 i) for a primitive int i ought to be very fast, compared to
> a Java method call that presumably takes a Number (and so would box the
> int).
That's why speculating is a waste of time.
zero? is preferred.
Rich
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