Thanks for the info! Unfortunately I don't have access to any VIA/Centaur CPUs, so couldn't test on those (though test results welcome if anyone is willing/able

Thanks for the info! Unfortunately I don't have access to any VIA/Centaur CPUs, so couldn't test on those (though test results welcome if anyone is willing/able to!). But yeah, you have to check the CPU you're running on when doing these tricks unfortunately, as results vary greatly across micro-architectures. Interestingly, there's a more optimal CLFLUSHOPT instruction on more recent processors, which often seems to be quite effective for this task.