Lars T. Kyllingstad wrote:
Is there ever any reason to use float or double in calculations? I mean,
when does one *not* want maximum precision? Will code using float or
double run faster than code using real?
I understand they are needed for I/O and compatibility purposes, so I am
by no means suggesting they be removed from the language. I am merely
asking out of curiosity.
-Lars
Size. Since modern CPUs are memory-bandwidth limited, it's always going
to be MUCH faster to use float[] instead of real[] once the array size
gets too big to fit in the cache. Maybe around 2000 elements or so.
Rule of thumb: use real for temporary values, use float or double for
arrays.
