Did you try to coerce the result of (~mask-fn ...) with int?
(or use aset-int as suggested by David)


On Tue, Mar 31, 2009 at 4:17 PM, Vincent Foley <vfo...@gmail.com> wrote:

>
> No, but in my defense I did not know such a function existed :)  I'll
> give it a whirl and report back!
>
> On Mar 31, 9:57 am, David Nolen <dnolen.li...@gmail.com> wrote:
> > Did you try using aset-int instead of aset?
> >
> > On Tue, Mar 31, 2009 at 8:25 AM, Vincent Foley <vfo...@gmail.com> wrote:
> >
> > > For those interested, I managed to improve the performance of my
> > > original program from 2 minutes 40 seconds to decode 1000+ files down
> > > to 2 minutes.  I'm still far from my goal, but it's an improvement,
> > > especially since the code is shorter and (IMO) cleaner.  You can see
> > > it here:
> > >http://bitbucket.org/gnuvince/clj-starcraft/src/tip/src/starcraft/rep.
> ..
> >
> > > And here's another question, running the program with -Xprof shows
> > > that nearly 20% of my execution time is spent calling
> > > java.lang.reflect.Array.set.  Is there something wrong with the way I
> > > type hint my array in make-reader?
> >
> > > Thanks,
> >
> > > Vincent.
> >
> > > On Mar 19, 8:12 pm, Vincent Foley <vfo...@gmail.com> wrote:
> > > > Hello,
> >
> > > > For the past few days, I've been trying, unsuccessfully, to make an
> > > > application I wrote faster.  A Java program that performs, more or
> > > > less, the same task takes 12 seconds (on my machine) to parse 1000
> > > > files; my Clojure program takes nearly 3 minutes.  This more than an
> > > > order of magnitude slower!  Using the profiling tools available with
> > > > the JVM, I quickly determined which function was the costliest.  I
> > > > copied it into a simple script file to profile it in isolation.  I
> > > > have made the script and the profile results (long!) available at
> this
> > > > URL:http://gist.github.com/82136
> >
> > > > I'm finding the results puzzling: is dereferencing a var *that*
> > > > expensive?  Can anyone tell me if they see something fundamentally
> > > > wrong with my approach that would explain this abysmal performance?
> >
> > > > Thank you,
> >
> > > > Vincent.
> >
> > > > P.S.: I am using Sun's JVM 1.6.0_10 as shipped in Ubuntu Ibex.  My
> > > > machine is an Athlon 64 X2 4200+ with 3 GB of RAM.
> >
> >
> >
>

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