When the system clock jumps backwards SimpleTimestamper hangs in a "endless" loop and eats CPU time till the clock has reached at least the the time when the clock jumped backwards.
Just run this
And then set the system clock to one day in the past. It will stop and instead just loop till you adjust the clock back again.
Not a big deal if you have NTP and the clock varies just a few milliseconds before it is adjusted again. But if there is a bigger change for whatever reason this will crash your system.