Slicing kick drum track into slices problem

When slicing hitpoints on a track and so have maybee a few hundred slices Cubase becomes unresponsive. While waiting for Cubase to do it’s housekeepeing after a few minutes control is possible, but any little thing like zooming out or in makes the unresponsines come back and I have to wait again a few minutes.

This is unworkable.

I use Cubase pro 8.05 64 bit.