CLOCKS_PER_SEC

Defined in header <time.h>
#define CLOCKS_PER_SEC /*implementation defined*/

Expands to an expression (not necessarily a compile-time constant) of type clock_t equal to the number of clock ticks per second, as returned by clock() .

Notes

POSIX defines CLOCKS_PER_SEC as one million, regardless of the actual precision of clock .

Until standardized as CLOCKS_PER_SEC in C89, this macro was sometimes known by its IEEE std 1003.1-1988 name CLK_TCK : that name was not included in C89 and was removed from POSIX itself in 1996 over ambiguity with _SC_CLK_TCK , which gives number of clocks per second for the function times() ).

References

See also

clock	returns raw processor clock time since the program is started (function)
clock_t	processor time since era type (typedef)
C++ documentation for CLOCKS_PER_SEC