Who cares about security if we can't make the F'n deadline? When it comes between doing it fast and doing it right, fast wins every time because you can BS around a wrong answer but not a missed deadline.
Otherwise, show me a high-speed, low-latency device interconnect that doesn't use DMA of some sort. My back-of-envelope physics calculations tell me you can't; the speed of light gets in the way.
Biting the hand that feeds IT
