Re: OOS approach revisited

Am 27.06.2025 um 09:29 schrieb dxf:

On 27/06/2025 12:16 pm, minforth wrote:

...
IIRC DO..LOOPs had been a hack for computers in the 60s.
A rather ugly hack, born out of necessity, slow and
often cumbersome to use. That it still persists in Forth
half a century later speaks for Forth's progressiveness.

 Testing FOR NEXT on my DTC system showed 15% speed increase over
DO LOOP.  Putting 5 NOOPs (executes forth's address interpreter)
in the innermost loop brought it down to 6%.  Not worth it IMO.
 

It really depends on how counted loops are implemented.
Most CPUs have operators for register-based count-down loops
that are blazingly fast.
If they can be used within Forth-based loop constructs
I would expect a greater speed increase than what you measured.