paintCompression and speed

[viktoras didziulis]

Any pointers on how paintCompression works... Dictionary says: "When an 
image is changed with a paint tool, it is recompressed the next time you 
leave the card it's on". Is this also true if imageData was directly 
updated - i.e. image gets compressed next time I leave the card it is 
on, isn't it? Or is image recompressed each time its imageData gets 
updated ? If so, likely RLE is the fastest method to choose or is it 
possible to disable paintCompression for images to get  more speed for 
image updates or RLE is the only option to go ? Or if imageData and not 
the actual image is what is displayed on screen, then may 
paintCompression have no impact on how fast imageData is being redrawn.

Best wishes
Viktoras