Question: I've noticed since installing Visual Studio 2010 SP1 that I'm having huge performance issues. It will randomly freeze up on me quite a bit.

I had no performance issues with Visual Studio 2010 before the upgrade. The only add-on I have running is ReSharper.

I'm wondering if anyone else is experiencing performance issues? If so have you found a way to fix them?

Answer: 
Just a small heads up about SP1: 

* If you have SQL Server Management Studio installed on the same machine, **don't** install SP1 just yet. You will lose all intellisense functionality. This is a major bug that must of slipped through.

In terms of performance, I haven't really noticed much of a difference.
I've had a lot more crashes since installing IronPython, but the main key to crashing appears to involve solutions with projects in 2 or more programming languages. I won't get crashes in C#-only solutions, nor VB-only solutions, but only in the ones with both (and more!) languages. It might also be that those solutions have a lot more projects.