In case you have observed any slowness in your source view around typing or arrowing through code, here are a few tips that may help.
1. Turn off background HTML validation. Go to Tools / Options and select Text Editor / HTML / Validation in the tree view on the left side. Uncheck the Show Errors check box.
2. Turn off AutoRecover. Go to Tools / Options and select Environment / AutoRecover in the tree view. Uncheck the Save AutoRecover check box.
3. Close your property grid (View / Properties Window)
Jim Bresler, a development engineer on our team, identified some performance bottlenecks and has made a few fixes recently. We are seeking volunteers to help us validate that these fixes speed up your scenario. Please refer to http://forums.asp.net/thread/1274096.aspx if you’d like to help with this.