On Monday 23 January 2006 21:56, Matt Ingalls wrote:

> On Jan 23, 2006, at 12:42 PM, Istvan Varga wrote:
> 
> > On Monday 23 January 2006 20:20, Matt Ingalls wrote:
> >
> >> is that really true?  when i looked into this [ about 5 years ago! ]
> >> all i found was some bit-wise operations on index increments for
> >> oscillators and stuff -- it would be no big deal to replace the  
> >> bit-wise
> >> stuff with a modulo or  if statement?
> >
> > Simply replacing a & with a % is not enough, as the latter cannot
> 
> as we say in california, "duh!"
> 
> > deal with negative numbers correctly, so you need an additional
> > if statement to fix that. Also, a % is much slower than a &.
> 
> how much? i seriously doubt it's worth the speed gain..

With two buils that are identical except one uses & in the
oscil.kk opcode, while another uses %, trapped.csd renders
about 20% slower on my machine. Note that this is the result
of changing a single opcode; the CSD uses many other opcodes
as well, so the slowdown of oscil itself is more significant.


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