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I've been using VMWARE Workstation 9 for 2 days and it's very slow.
My computer has 6GB of Rams ,i5 Processor.
I use VMWare player and I don't have any issues with performance. You might want to read the below blog post going into detail the performance impact that enabling virtualization has on the BB Simulator.
Hope this helps!
Are Virtualization extensions enabled and used by VMWARE?