ref: 528d9cca9a1fe1e68c5c4f7cce4a99f5e3262186 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);