clock(3) – determine processor time used

CLOCK(3) Library Functions Manual CLOCK(3)

NAME

clock — determine processor time used

#include <time.h>

clock_t
clock(void);

The clock() function determines the amount of processor time used since the invocation of the calling process, measured in CLOCKS_PER_SECs.

The clock() function returns the amount of time used unless an error occurs, in which case the return value is -1.

The clock() function conforms to ANSI X3.159-1989 (“ANSI C89”).

OpenBSD 7.8 June 5, 2013 CLOCK(3)