ref: 0c62e0f146c5d0584661d1a05daa4c91a6d1afc9 dir: /timefuncs.h/
#pragma once double sec_realtime(void); uint64_t nanosec_monotonic(void); void timestring(double s, char *buf, int sz); double parsetime(const char *s); void sleep_ms(int ms);