Comment 14 for bug 1900783

That's very good news, although there is no fonts-specific change/fix in that revision.
That revision uses LZO compression, which trades snap size (from ~172MB to 252MB) for startup speed. I'm glad this improves the situation so significantly! I am also working on a specific fix for font cache generation (using the gnome-3-28 snapcraft extension to build the snap), so I'll keep this bug open to track progress on this.