Renders per second from the stored window.
Divides by the window, not the elapsed span, as renderRate() does (a three-second-old window holding two renders is not 0.67/s).
renderRate()
Renders per second from the stored window.
Divides by the window, not the elapsed span, as
renderRate()does (a three-second-old window holding two renders is not 0.67/s).