[Openmcl-devel] string handling question
Andrew P. Lentvorski, Jr.
bsder at mail.allcaps.org
Tue Nov 9 13:36:25 PST 2004
On Nov 9, 2004, at 7:36 AM, alex crain wrote:
> For example,
> (FIND #\s "mystring")
> eventually boils down to
> (dovector (a "mystring")
> (when (eq a #\s) (return a)))
> but some implementations of strchr are smarter then that and would do
> things in 4 or
> 8 byte chunks.
> Since I'm working on an OpenMCL editor, implementation dependence is
> not a problem.
Personally, I really would not walk this path.
Unless you preload the cache with the constant string, the time
required to pull that string from main memory will more than dominate
the time to loop over it for small string lengths.
In addition, a generic loop unrolling optimization would be useful to
OpenMCL, in general. Although, it may already exist for certain levels
What is the larger context problem that you are trying to solve?
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