This was a client provided laptop, wow?! Yikes, if you had issues with 8GB and i5 I don't stand a chance.
I was monitoring with Task Manager whilst HANA Studio was puking trying to auto assign source/target mapping from two (large sources) and neither CPU nor memory was maxxed out. JAVAW.exe looked "capped" at 25%.
Looking at the hdbstudio.ini there are parameters like -xvm and MaxPermSize that could be tweaked to effect, any successes here John Appleby?