get-internal-run-time

get-internal-run-time is a built-in function in `C source code'.

(get-internal-run-time)

Return the current run time used by Emacs.
The time is returned as a list (HIGH LOW USEC PSEC), using the same
style as (current-time).

On systems that can't determine the run time, `get-internal-run-time'
does the same thing as `current-time'.