

On that same page, you can change "Gaussian blur quality for display" and "Filter effects quality for display" In version 1.0 this is in Preferences > Rendering > Number of Threads (has moved around in previous versions) If you're using a computer with multiple cores/threads/processors (usually laptops) and have trouble with displaying filters, you can adjust some settings to better utilize the cores.If you can, link imported raster images rather than embedding.This prevents Inkscape from displaying filters only.

Use View menu > Display Mode > No Filters.This prevents Inkscape from displaying gradients, filters, embedded raster images, etc. Use View menu > Display Mode > Outline.When you're finished, don't forget to delete this bitmap copy Move the new bitmap to a visible layer and hide the ones it's replacing Temporarily hide the layers you're working on, and display all the others If hiding layers won't work, because you still need to see them, as you continue to work, try this.Since Inkscape doesn't display hidden layers, it frees up resources for whatever you're working on. Then you can hide all the layers that you don't need at the moment. Divide your file into layers, and maybe even sublayers.If this doesn't help, or help enough, move on to the next things.
INKSCAPE WORK TIMER TRIAL
Especially if you're doing a lot of trial and error as part of your workflow, this data can accumulate, and slow down a file, even if there is very little content on the canvas. (Before version 0.91 it was File menu > Vacuum Defs.) This will delete any data in the file that is not in use.
