Export log.txt with render times on rendering animation

Is logging render time when rendering animation frames possible? Outputting a .txt file looking like this:

render times.txt

(frame# - render time in seconds and /100 seconds)
1 - 45.67
2 - 45.87
3 - 44.98
4 - 45.22

It would be useful in many cases.

Sure it is possible. Just hook up a pre and post render handler and measure the time.