[CM] most efficient way to map over a vector?

[Elijah Stone]

Sorry, should be

(do ((i 0 (+ 1 i))
      (l (length v)))
     ((>= i l))
   (float-vector-set! v i (f (float-vector-ref v i))))

On Sat, 2 Apr 2022, Elijah Stone wrote:

> Probably:
>
> (do ((i 0 (+ 1 i))
>     (l (length v)))
>    (>= i l)
>  (float-vector-set! v i (f (float-vector-ref v i))))
>
> Obviously substituting int-vector-* or byte-vector-* if appropriate.
>
> That said, if performance is really important, I might just write the code in 
> c.
>
> On Sat, 2 Apr 2022, Iain Duncan wrote:
>
>> Hi all, I'm mapping some transforms over vectors in a part of the code that 
>> I need to have run as efficiently as possible. I'm hoping someone can tell 
>> me what the fastest running approach to this is. I would like to leave the 
>> data as vector as it is used in a framebuffer at the C level.
>> thanks!
>> iain
>> 
>> 
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