I'm running Flash Builder on a Windows Vista machine. I created a default application project and created a new component. I started editing that new component in the MXML editor, opened the help window to look up some stuff, when back to edit and it freezes up for about 10 seconds. I edited a little more and then it freezes up again for 10 seconds. I looked at the FB process footprint (gumbo.exe) and its 500Megs, 5 times larger than anything else including Photoshop. I was also running Flex Builder 3 at the same time. Is there some known issues...googling I found a similar complaint for Mac.
This is a known, intermittent issue. Please see http://bugs.adobe.com/jira/browse/FB-19935.
Jason San Jose
Quality Engineer, Flash Builder
North America
Europe, Middle East and Africa
Asia Pacific