Subject: Re: FreeBSD Bus DMA
To: None <>
From: Perry E. Metzger <>
List: tech-kern
Date: 06/12/1998 00:57:48
"John S. Dyson" writes:
> Perry E. Metzger said:
> > 
> > I've tried to use both. I haven't seen particularly much difference,
> > frankly. I have heard your claim that FreeBSD compiles code "three
> > times faster" and such, and frankly it isn't true. Claiming FreeBSD is 
> > five percent faster under some conditions on a normal machine is
> > within the realm of the believable, but I'm not even certain that that 
> > is true.
> >
> You are misstating my claims, and I hope you meant to by mistake, becuase
> otherwise your ethics should be challenged.

I thought I'd quote your last comment on this, just to make sure that
people understood on what basis I'm making these "unethical" claims
about your statements.

"John S. Dyson" writes:
> That isn't what I have seen, and that has nothing to do with
> benchmarks but compiler loads, and real user productivity in that
> environment.  One of our teams decided that BSD really performed
> badly, based upon their NetBSD experience.  We did experience
> a 3X speedup, and paging performance had little to do with it.
> I didn't run those tests, and they were done by a skeptic :-).

I didn't realize that I should have interpreted this as "our source
tree, compiled on some random machine, compiles three times faster
than yours, compiled on some different random machine".