This program measures the overhead in using the timer classes "cputimer" and
"clocktimer"

all measurements are made 1000000 times...

Measuring the overhead of the 1000000-loop...
Overhead: clock secs:0  clock usecs:51093
Overhead: cpu secs:0  cpu usecs:50000

Measuring the overhead of clocktimer...
Overhead: clock secs:12  clock usecs:140469
Overhead: cpu secs:12  cpu usecs:140000
Average times:  clock secs:1.2e-05(=12 usecs)  cpu secs:1.2e-05(=12 usecs)

Measuring the overhead of cputimer...
Overhead: clock secs:23  clock usecs:993865
Overhead: cpu secs:21  cpu usecs:890000
Average times:  clock secs:2.3e-05(=23 usecs)  cpu secs:2.1e-05(=21 usecs)