2 ms·

One reason why the PI can be slow here is lack of any ARMv8 Crypto Extensions and by running in 64 bit mode it can make it even slower. https://www.raspberrypi

• coder543 6y ago
  Also keep in mind that the Raspberry Pi Zero (used by the person you're responding to) has the same processor as the original Pi. I'm certain that the Pi 4 does tremendously better at handling crypto than the original Pi processor. The 64-bit versus 32-bit thing is almost certainly software wonkiness, as that forum post indicates. There's no reason the 64-bit mode should be slower than 32-bit mode for that task, and benchmarks often show that 64-bit ARM is actually measurably faster than running in 32-bit mode, due to the additional available registers and whatnot.