Now Ubuntu 20.04 is out the door there’s a ton more users installing and using some flagship desktop snaps. Startup speed is still being cited as a common complaint when using some of the popuplar snaps such as Chromium, Firefox and LibreOffice.
Some work has been done by @ijohnson to analyse the bottlenecks and has been covered in threads such as Effects of dynamic library caching on Snap startup performance and Squashfs performance effect on snap startup time .
Where are we with these? What wins can we get? What further analysis is needed either in snapd or desktop launchers, fontconfig - or indeed any other part of the stack :D.