Hi! Just to share our latest feature. We have implemented a simple mechanism in Roassal to prevent the environment to be sluggish with many elements. The class RTCache has the effect to remove the elements from a view, create a bitmap from them, and add the bitmap to the view. Simple and effective. Consider the following script: -=-=—=-=-=—=-=-=—=-=-=—=-=-=—= v := RTView new. v @ RTDraggableView. colors := ColorPalette qualitative colors: 8 scheme:'Set1'. elements := (RTEllipse new color: [ :aValue | colors atRandom alpha: 0.01 ]; size: #yourself) elementsOn: ((1 to: 500000) collect: [ :vv | 10 atRandom + 5 ]). elements do: [ :e | e translateTo: 500 atRandom @ 500 atRandom ]. v addAll: elements. RTCache new cacheView: v. v -=-=—=-=-=—=-=-=—=-=-=—=-=-=—= Without the line "RTCache new cacheView: v.” Pharo would be completely unresponsive. 500 000 elements is quite a lot. The drawback is that all interaction with the elements are lost. I have some idea on how to add them back. We will work on this in future work. Cheers, Alexandre -- _,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;: Alexandre Bergel http://www.bergel.eu ^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;. _______________________________________________ Moose-dev mailing list Moose-dev(a)iam.unibe.ch https://www.iam.unibe.ch/mailman/listinfo/moose-dev