They tried this on an AM335x, a modern ARM Cortex A8 used on the BeagleBone Black for example. Clocked at 1 GHz and doing nothing else other than toggle a GPIO

They tried this on an AM335x, a modern ARM Cortex A8 used on the BeagleBone Black for example. Clocked at 1 GHz and doing nothing else other than toggle a GPIO pin - it took 200 ns. This is for a fully integrated SoC. Merely due to various levels of interconnect within the CPU. Here is the slide for reference: http://imgur.com/a/sWyH5 http://imgur.com/a/sWyH5