Hi all.

I have been struggling all morning to pinpoint the reason of Inkscape hanging with cpu at 100% for at least 10 minutes on my 4core i5 while editing a very big file containing at least 56000 nodes. before yesterday everything worked fine, albeit sluggish.

setup of my document:

its a 10 layer recreation of A back glass of the Bally "The Wiggler" from 1967. every layer represents a color. the transparacy lyer is not done yet.

but as i started with a photo, a lot of touching up has to be done.

as soon as i turn on "snap nodes, path and handles" with the button on the right, my cpu goes to 100% and inkscape becomes unresponsive to the point that switching to another program on my UBUNTU 18.04 box the cursor stays the same and i cannot click anywhere. switching to 0.92 did not change a thing. also going back one or two kernel versions did not improve matters. BTW I'm on kernel 4.15.0-103-generic

tldr:  turn of the "snap to nodes, path and handles" while doing node tweaking with large files.

Looks like a great project. The spacemen are a hoot.

56K nodes should not be a big stretch for Inkscape, but also having a lot of snaps active could be.