I came across the function "pinModeFast" recently (https://forum.pjrc.com/threads/28735...ll=1#post75044) and would love to see this as a permanent feature for the Teensy environment.

As a minimum, it would be useful for everyone to be able to check their scope bandwidths.

I'm currently investigating fast pulsing ideas for photon experiments and an edge guaranteed better than 1 nanoSec risetime is useful for calibration. Could also be good for checking transistor responses.