I just made an solution wide rename of the application namespace in an ASP.NET application with about 40 pages. Nothing really special nor big. Quite simple kind of webmail app.
During rename the memory usage shown by R# rose from 51 Mb to an astounding 355 Mb, at which point VS2010 stopped reacting and froze. Had to kill and restart it.
Are those memory/performance problems going to cease one day? I can tell you, if those problems are not fixed in V6.0 our company will definitely NOT upgrade from 5.1 and stop using it at all. Its unbelievable that after 2 years of problem reports from many clients the performance problems still persist.