After working some time with 6.1.1 without problems today i encounter again massive performance problems with the VB editor. I'm working on a refactoring of a large file (around 10.000 lines). I had no problems until i duplicated a method of around 1.000 lines i wanted to refactor. After pasting the code into the editor i changed the method signature. For this reason i got a bunch of errors (> 100). After this VB Editor becomes slower and slower and after some minutes the was an error popup from R# denoting low virtual memory and shortly after that VS crashes with an OutOfMemoryException. This behavior was reproducible each time i restarted VS. I took two performance snapshots with dotTrace which i will upload this evening (can't do this at work). While taking the snapshots VS was very slow but it didn't crashed.
(My configuration is: Visual Studio 2010 SP1 on Windows XP SP3)