Arduino nano, but faster

Using Arduino Microcontrollers
9

I then went back to the Nano to see if the pointer version worked OK:

#define PIN 2

uint8_t *myPort;
uint8_t myPinBit;

...

    *myPort |= myPinBit;
    *myPort &= ~myPinBit;

It did work, and the result was:
digitalWrite() 3.59us, Port Manipulation 0.41us which is 8.76 times faster

So using the pointer slowed down the direct port manipulation, but it works with and without using a pointer.

Using the "volatile" keyword slowed it down a little further:
digitalWrite() 3.59us, Port Manipulation 0.54us which is 6.70 times faster