Okey so I have found the Class instance that was holding onto the data. I can now save my image after a parsing without tripling its size.
But the VM's memory footprint (according to Windows task manager) does not falls back to normal after a parse. My guess is that now that the VM was allocated more space, it juste doesn't give it back. It still bugs me a little since I can see the memory occupied by the VM drop when minimised in the task bar. > If you want to use a huge data structure, you have to think carefully > about your representations. There are tricks you can use to conserve > memory: use more primitive types (SmallIntegers, bit flags, Symbols), use > shared instances, use alternatives like ZTimestamp which is half the size > of DateAndTime, or use your own integer time, sparse data structures, and > so on - and you can hide these optimisations behind your standard API. > I have a quick question regarding primitive type: 1 sizeInMemory -> 0 1.0 sizeInMemory -> 12 I do use a integer as my timestamp, encapsulated in a class, which also weight 12 bytes. This makes me think that the a Float weighting 12 bytes is an encapsulation of a primitive type I don't know of. If so, is it possible to not use a Float, but something like a double ? Thomas.