Hi folks. I wasn't aware of the class SparseLargeTable but it seems it has two important instances "SparseLargeTable allInstances size -> 2" They are the class side variables #DecimalProperty and #GeneralCategory in Unicode. Actually, (Unicode classPool at: 'GeneralCategory') size -> 917632 (Unicode classPool at: 'DecimalProperty') size -> 917632 So...collections of almost 1 million elements. Now a couple of questions: 1) Is this normal/expected? In my calculus both arrays are like 3mb of memory 2) If I don't use UTF and I send an encoding as parameter in the VM (different from UTF), do I need this class side variables? Thanks and forgive my ignorance in this field...I just get the alarm while doing some memory analysis for a paper. Mariano