In general CPUs have idle cores, but this looks like it's supposed to be a dual core setup so that's going to be less of a factor. I think the main idea is that you only have to do the optimization once but you run the code many times, which is an improvement from Transmeta where you threw out your optimizations when the process ended.
http://www.tiriasresearch.com/downloads/nvidia-charts-its-ow...
In general CPUs have idle cores, but this looks like it's supposed to be a dual core setup so that's going to be less of a factor. I think the main idea is that you only have to do the optimization once but you run the code many times, which is an improvement from Transmeta where you threw out your optimizations when the process ended.