Performance slow down because of cache method change

Hello,

Usings the C- API of GraphicsMagick 1.1.5 on windows (Win2000 or XP) we
encountered a mysterious slow down after processing of some hundreds of
frames. The performance goes down to about 40 percent of the initial
value. The slow down - as far as I can see - does not occur on the
Linux platform. There is no memory leak visible.
With Bobs help I found out that the pixel cache method changes instantly 
from memory cache to disk cache and this causes the slow down.
But now I don't know why this happens and I don't understand how 
GraphicsMagick decides which method it uses. Is there a way to force 
GraphicsMagick to use allways memory cache?

Thanks in advance,
Stefan v. Wachter

ALPHA-OMEGA digital GmbH
Munich, Germany



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