I've been experiencing a lot of lag and slowness too since several days ago. A thought it was because I had too much opened, but today I closed everything, rebooted several times, and with only Webflow opened, it's still excruciatingly slow. Almost every task takes 3-5 seconds, and the CPU gets fully loaded while doing every task, even for simple things like selecting elements.
What could be going on?
I'm working on a HP Chromebook 14.
EDIT: I just realized that it seems to be happening only with one site in particular. When opening other sites, everything works fast again. I didn't create this site, but it has a very long list of class selectors and interactions. Could that be what's slowing the app? Just a simple task like deleting an element and undoing it, takes a long time.
@Waldo, what do you think?