Am 25.01.2017 um 09:47 schrieb David Turner:
The trouble with the real-time clock is that it can change discontinuously, even backwards, and it is hard to account for things like leap seconds with it, so durations calculated by subtracting two UTCTimes are a little unreliable.
OTOH you might well want to know the real start and end times of your process instead/as well - it depends on your application.
You use the proper tool for the job. Monotonic clock for measuring durations, UTC for reporting approximate points in time. I.e. something like 2017-01-12 10:43: benchmark #3 started 2017-01-12 10:43: benchmark #3 took 3.472 ms to complete Mixing the monotonic durations and UTC is a path to madness, and nothing good can come from it. (SCNR the hyperbole.)