It depends of many things.
If you start PSPad, it takes about 11MB
Each file consums 2 times that is its size (unicode chars). After some time undo
and redo buffer takes another space.
Dictionary - if you activate use spelcheck takes memory - depends of the
dictionary size.
Templates takes space, because there are loaded if you open some file and stays
in memory to prevent loading every time thei are needed.

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PSPad freeware editor http://www.pspad.com

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