# CLOCKS_PER_SEC

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< cpp‎ | chrono‎ | c

Defined in header `<ctime>` |  |
#define CLOCKS_PER_SEC /*implementation defined*/ |  |

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

### Notes

POSIX defines `CLOCKS_PER_SEC` as one million, regardless of the actual precision of std::clock().

### See also

clock | returns raw processor clock time since the program is started (function)
clock_t | process running time (typedef)

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