When I apply the Deform filter to the entire clip (to remove distortion from my GoPro footage), the in-editor playback doesn't work smoothly. I found the preview quality dropdown and that was helpful enough for the first video I worked on. But now that's not good enough: titles on top of the corrected video still choke it and I can't see if the effect I set up looks right when playing!
Is there a mode to have it think about it first, then play smoothly? In my old copy of Premere, that was automatic and it cached the rendered frames, so the second time I played the same region (without having made any changes) it worked fine.