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:55579
Overhead: cpu secs:0  cpu usecs:60000

Measuring the overhead of clocktimer...
Overhead: clock secs:20  clock usecs:841964
Overhead: cpu secs:20  cpu usecs:840000
Average times:  clock secs:2e-05(=20 usecs)  cpu secs:2e-05(=20 usecs)

Measuring the overhead of cputimer...
Overhead: clock secs:7  clock usecs:858110
Overhead: cpu secs:7  cpu usecs:860000
Average times:  clock secs:7e-06(=7 usecs)  cpu secs:7e-06(=7 usecs)