On Thu, 2005-02-10 at 01:00, Marcin 'Qrczak' Kowalczyk wrote:
> skaller <skaller@users.sourceforge.net> writes:

> >        new C  w/o old C  new Felix  old Felix  HACKED  Ocamlopt Ocamlb
> > y=10    0.5   0.8    1.8       2.9          7     10      0.4     12 
> > y=11    7.4   12.5  16        28           55     75      2       50
> > y=12   64     98   113       180          290    370      9      220
> 
> A further speedup in C:
> 
> __attribute__((regparm(2)))
> int ack(int x, int y) {
>    ...
> }

You are certainly not kidding! With that change:

         C         Felix   Ocamlopt
Y=10   0.5         0.8        0.4
Y=11   2.1         9.3        2
Y=12  21.5        87          9


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John Skaller, mailto:skaller@users.sf.net
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