micropython/micropython — pull request #881 by dhylands (2014-09-28 18:26:00+00:00)
Title: Added pyb.elapsed_millis and pyb.elapsed_micros

tested using:
stmhal: https://github.com/dhylands/upy-examples/blob/master/elapsed.py
teensy: https://github.com/dhylands/upy-examples/blob/master/teensy/elapsed.py