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by pygy_ 4772 days ago
A few more data points: MacBook Air, Core i5, dual core with hyperthreading.

Chrome 27: 1 or 2 cores. Chrome 26 gave me 3 a few times.

Firefox 21: 8-16 cores. One times out of four, the test goes up to testing 32 cores, but the CPU activity drops abruptly, and the test hangs (the button text remains a greyed out "Running").

Safari 6.04: 1 core. Rarely two.