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:40639
Overhead: cpu secs:0  cpu usecs:40000

Measuring the overhead of clocktimer...
Overhead: clock secs:49  clock usecs:843499
Overhead: cpu secs:49  cpu usecs:810000
Average times:  clock secs:4.9e-05(=49 usecs)  cpu secs:4.9e-05(=49 usecs)

Measuring the overhead of cputimer...
Overhead: clock secs:57  clock usecs:483837
Overhead: cpu secs:57  cpu usecs:440000
Average times:  clock secs:5.7e-05(=57 usecs)  cpu secs:5.7e-05(=57 usecs)