time()
Syntax
time()
Returns the number of milliseconds since ‘some point’, like Java’s
System.nanoTime(), which varies from system to system and from Java to Java.
This measure should NOT be used to determine the current (date)time, but to
measure durations of things. it returns a float with time in milliseconds (ms)
for convenience and microsecond (μs) resolution for sanity.
start_time = time();
flip_my_world_upside_down();
print(str('this took %d milliseconds',time()-start_time))