Your official information source from the .NET Web Development and Tools group at Microsoft.
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.