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When working with some performance tests I noticed that FlapTab was consuming too much time repositioning itself when morphs in the world view resized. The attached change list cuts the time for FlapTab>>ownerChanged by about 33%. With 9 tabs on my image it amounted to a 3% overall improvement. The changes involve testing for position changes before making them so it does not reposition to the same location, and using symbols rather than strings, and == rather than collection>>includes:.
Michael
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