No rerendring in Smart Effect

I use PreRender - SmartRender in the Effect to support 32-bit depth color, and the effect should process whole image at once. The problem is that AAE asks my Effect to rerender the result every time i do zooming or moving of an image with mouse in AAE.

This discourages me because one render takes a lot of time. Please, answer, is there any way to supress rerenders in Smart effect?

Thank you.