Hi Dennis,
Nice tests :-)
I agree: The conclusions are a bit hard to understand...
I am inclined to think that for intensive calculations (repeat for
each pixel tPixel ;-) global arrays would be always preferable.
In most cases and *practically*, custom properties "slowness" (as I
explained it in a previous post) is not a problem.
Depends on the context.
I bet that, in many cases, code optimisation has to be searched for
elsewhere :-)
Le 4 juil. 05 à 23:42, Dennis Brown a écrit :
The conclusions are a bit hard to understand for this example, but
it appears that custom properties sets used instead of global
arrays are about 2.5 times as slow for writing and 3 times as slow
for reading, except for the case where a very large data string is
stored, then it seems to take much longer for the globals to create
a very large data space for each element. I can only conclude that
the method used for creating new data space for globals involves a
lot of shuffling of memory structures, while the method used for
custom properties is simpler. However, it is only a guess at this
point.
In any case using custom properties for the compute intensive
arrays would significantly slow my program. However, they would be
a viable alternative to globals for many cases.
Best Regards from Paris,
Eric Chatonet.
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