[Newbies] Morph speeds up stepping when grabbed
Hi kropki,
I'm glad you were able to solve your problem.
A while back I did some experimenting. What I saw was that browsers, particularly overlaping browser, were the culprit.
When your morph is in the world (as opposed to when it is in the hand i.e. picked up) to update itself squeak needs to redraw all the morphs that are also within the boundries of your morph. If this includes a browser this will slow things down. If it overlaps several browsers... Well you can read the mantis report if your curiosity is still on.
http://bugs.squeak.org/view.php?id=2084 0002084: Each overlaping browser slows down screen updates considerably. Caching the image would speed things up.
The hand knows it is going to be updated frequently so it does clever things (like storing the pixels under it) in order to speed up the drawing process. This means when your morph was picked up it got special treatment. In particular it did not trigger the redrawing of the browsers.
Yours in service and curiosity, --Jerome Peace
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