Simple
stopwatch objects with the following member functions:
void start() start timing double stop() stop timing (return total time) double stop_d() stop timing (return time since last start) double reset() set elapsed time to 0.0 (return total) double read() read elapsed time (total)
The following stopwatches are available:
stopwatch measures CPU time (userpace + system) stopwatch_u measures CPU time in userspace incl. children stopwatch_us measures CPU time userspace = system incl. children stopwatch_e measures elapsed (wall clock) time
