When I open a workspace with 30 projects, any touch of a plist or code causes the CPU to jump for about 30 seconds. I often notice mono-sgen32, about 30 of them, appear for a while, then go away.
That may be caused by Source Analysis. Try turning that off and see if the problem goes away.
Yah, that was the first thing I tried. It seems to be related to Workspaces with a couple dozen solutions.
You might want to file a bug report for that. It may be related to your other topic about "too many files open".
I won't mention the obvious workaround for your problem.
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