clock(3)clock(3)Nameclock - report CPU time used
clock_t clock ( )
The routine returns the amount of CPU time (in microseconds) used since
the first call to The time reported is the sum of the user and system
times of the calling process and its terminated child processes for
which it has executed or To determine the time in seconds, the value
returned by should be divided by the value of the macro CLOCKS_PER_SEC.
The resolution of the clock is 16.667 milliseconds.
The value returned by is defined in microseconds for compatibility with
systems that have CPU clocks with much higher resolution. Because of
this, the value returned will wrap around after accumulating only 2147
seconds of CPU time (about 36 minutes).
See Alsowait(2), times(3), system(3)clock(3)