Oh, wow. So I was testing this in Geiser repl in emacs: (2467 4631 4088 3934) Where apparently "slower" one wins
But in DrRacket the result looks plausible: (8994 1859 1094 865) Does that mean Geiser shouldn't be trusted? --- Vlad Kozin <vladilen.ko...@gmail.com> On Oct 2, 2013, at 1:57 PM, Laurent wrote: > What values do you get? > For 4'000 strings (old slow computer), I get: > (236 148 84 84) > for slow, medium, fast, really fast, which is consistent with Jay's post. > > Laurent > > > On Wed, Oct 2, 2013 at 7:28 PM, Vlad Kozin <vladilen.ko...@gmail.com> wrote: > Mostly a question to Jay McCarthy but I suppose could be interesting to > others. Was going over his Reversing strings article. Somehow I get weird > performance. Slowest solution turns out fastest, medium, fast and really fast > are only marginally different. > > Could anyone have a look https://github.com/vkz/warm-up > reverse-string.rkt has the solutions > test-reverse-string.rkt does the performance check > Testing it on 40'000 randomly generated strings 1000 chars each. > > While we're at it, why do we garbage-collect thrice here? > let-values ([(as cpu real gc) (time-apply (λ () exp) empty)]) > (collect-garbage) (collect-garbage) (collect-garbage) > > Thanks! > --- > Vlad Kozin <vladilen.ko...@gmail.com> > > > > > ____________________ > Racket Users list: > http://lists.racket-lang.org/users > >
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