Yes, there are all kinds of things you can do to help performance. The good news is that major breakthroughs have been made in the way that VS works and that in the next big build that will be released (0807) the VS performance will be drastically improved.
First thing is to let the garbage collector do its business by cleaning up some unused memory. To do this all you have to do is minimize the VS window. Have a look at the amout of RAM that devenv.exe uses before and then after you minimize the window.
Another suggestion I heard was to disable documentation view:
1. Close all VS.net instances
2. Go to the ConfigurationManager.config file in the Bin folder of K2Studio. (C:\program files\K2 BlackPearl\Bin)
3. Comment the following line in the ConfigurationManager.config file. You will find it under the Environments node, where the environment name = "VisualStudio"
a. This can be added back, and the documentation view will sync with the Process Definition.
<!--<view type="SourceCode.Workflow.Design.DocumentView" assembly="SourceCode.Workflow.Design, Version=4.0.0.0, Culture=neutral, PublicKeyToken=16a2c5aaaa1b130d" name="DocumentView" designerType="SourceCode.Workflow.VisualDesigners.ProcessDesigner" designerAssembly="SourceCode.Workflow.VisualDesigners, Version=4.0.0.0, Culture=neutral, PublicKeyToken=16a2c5aaaa1b130d"/>-->
4. Open the Process file in your project with a text editor. Find the Document View node the Views node. Remove the Document View
<DocumentView Type="SourceCode.Workflow.Design.DocumentView" Assembly="SourceCode.Workflow.Design, Version=4.0.0.0, Culture=neutral,PublicKeyToken=16a2c5aaaa1b130d">
...
</DocumentView>
Save and close, and open the designer.
I'm sure there are more performance tips that these so lets here from other users?
Gerhard
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