Keyword bug causing huge load

We have an issue with the new online-search, that analyzed the keyword while letters are typed.
the background search causes huge ressource load that makes it nearly impossible for our editors to edit a new post. entering the keyword sometimes takes several minutes.

plaese make it switchable . e.g. search after the input field have been left. (like it was before)

hope you ca understand, what I mean ??

greets,
alex