frameTimeNS
Nanosecond timestamp for this frame.
Updated during Window.begin. Will not go backwards. Good for
performance timing.
If you need to time a UI thing, consider secondsSinceLastFrame, as that
will report a reasonable value even if the clock goes wrong and
frameTimeNS stops advancing.
Only valid between Window.beginand Window.end.
Source
Implementation
pub fn frameTimeNS() i128 {
return currentWindow().frame_time_ns;
}