prevent rerender on scroll..

react-fullpage calls render function with event like onLeave, afterLoad events..
that leads too many rerenders..

so.. i've developed to render empty div if component's index isn't current index.

but not resolved since it calls twice per scroll (onLeave, afterLoad) and result in render hundreads of empty components twice..

is there any way to reduce rerender number of times?
i render about hundreads of elements with memoization..

sincerely..