[KevinH]

That is nowhere near 80meg of images. It also has subdirectories in it and a txt file which means it is not from an epub created or edited by Sigil.

I am not seeing any slowdowns with images of the sizes shown here in xhtml files of the sizes you showed before.

I am also not seeing a memory leak. I have let Sigil run for days with no signifcant growth in memory used.

So there is something specific to your use of Sigil or your platform that is causing problems. We are trying to figure out what but need to know how many img tags you use on average in each xhtml file so that we can try to recreate the problem on our development machines to fix an issue if one exists.

See my earlier reply about counting img tags in all if your xhtml files using a simple command line I supplied. Please simply report its output so that we can create something similar of our own. Either that or simply post a single chapter epub that illustrates the problem.

We are trying to help but your rambling on about unrelated things is not helping anyone figure out what is going on. It is clear that nothing you have showed us imagewise was in an epub created by Sigil which makes this whole thread questionable.