Until today i could live with the performance problems which R# causes in VB projects. But now i had the situation that Visual Studio crashes while editing a large VB file. The file i edited is a module with around 5.000 lines of code which contains only definitions for global constants (if you ask why, the code is from an around 10 years old solution original writtten in VB 6). I copied around 20 of them because i'm lazy (just wanted to declare some new ones and take over the type definitions by renaming just the constant names). This caused a number of syntax errors (duplicate identifier) which is correct. From the time the errors are shown, the editor becomes slower and slower. After renaming three constants Visual Studio hangs for around 2 minutes and then crashes with the "Visual Studio encountered a problem" dialog.
I tried to take a performance snapshot with dotTrace but unfortunately my trial license has expired.