Big file lagging a lot

Hi there,

I'm working with a pretty big file (90MB), which is due to the sheer amount of paths with tens of thousands of nodes. It's making Inkscape lag pretty badly for any action (it takes about 1 minute to add a space to text). I've tried combining paths, disabling magnetism, and cleaning up, but none of that helped.

Is there a way to reduce lag in a non-destructive way that I may not have tried yet? Of course I would rather keep my nodes and paths as is.