Time millisecondsToRun: [| view | view := MOViewRenderer new. view nodes: (1 to: 50) forEach: [:each | view nodes: (1 to: 10) forEach: [:ea | view nodes: (1 to: ea * each). view gridLayout]. view gridLayout]. view open] => 18955 in Pharo => 23566 in VW :-) And I am sure there are rooms for improvement (IdentityDictionary are used with a small number of elements, a lot of OrderedCollection are used, ...) 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