Re: [Chicken-users] -benchmark-mode

[Daishi Kato]

Felix, thanks a lot!

What then questions me is the difference
among -O1, -O2 and -O3.

Daishi

At Fri, 16 Dec 2005 07:43:57 +0100,
felix winkelmann wrote:
> 
> -benchmark-mode implies -O3, which implies -optimize-leaf-routines.
> 
> The latter transforms routines that don't perform any further
> calls and do only simple operations into non-CPS procedures,
> which is more efficient. So for example:
> 
> (define (foo x) (+ x 1))
> 
> (print (list (foo 33) (foo 44))) ; call twice to avoid beta-contraction
> 
> produces:
> 
> /* foo in k18 in k15 in k12 */
> static C_word C_fcall f_22(C_word t1){
> C_word tmp;
> C_word t2;
> return((C_word)C_u_fixnum_plus(t1,C_fix(1)));}
> 
> 
> cheers,
> felix
> 
> On 12/16/05, Daishi Kato <address@hidden> wrote:
> > Hi,
> >
> > I just wondered about csc -help,
> > why -benchmark-mode does not include -optimize-leaf-routines,
> > although I have no idea what it exactly is.
> >
> > Thanks,
> > Daishi
> >
> >
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> >