It appears that while adding significant improvements for Solution Browser in v2.8.x, I’ve unintentionally introduced a serious performance issue. I moved code model processing for the entire solution onto a secondary thread to free up UI thread. This was put in place to support Solution Browser’s toolwindow mode. It works fine for small to moderate size solutions but is very slow on large solutions. I should clarify that it’s consistently slow, it’s just more apparent on large solutions.
I’ve been just recently made aware of this issue and have been looking into addressing it. This is going to push back a scheduled maintenance update that was supposed to go out last weekend. I’ll need some time to get it addressed properly so stay tuned.
Sergey @ USysWare