Intrinsic Subroutine: Returns a processor-dependent approximation of the processor time in seconds. This is a new intrinsic subroutine in Fortran 95.
Syntax
If a meaningful time cannot be returned, a processor-dependent negative value is returned.
Examples
Consider the following:
REAL time_begin, time_end
...
CALL CPU_TIME ( time_begin )
!
!task to be timed
!
CALL CPU_TIME ( time_end )
PRINT *, 'Time of operation was ', time_end - time_begin, ' seconds'