Travis takes nearly 22 minutes to do a test run with the slowest test currently at just under 8 minutes. That means on Travis the slowest test takes roughly 1/3 of the time. But with your machine taking literally 2 minutes, or 1/10 the time as Travis, to do a test run, Terry, I'm not worried about speeding up your machine. ;)

But yes, we could change it to being the first 50% if people wanted. The 75% was somewhat arbitrarily selected to not artificially constrain the introduced pseudo-randomness of the test order.