[Bug 1970989]

[Jérôme Bouat]

I'm describing below an other test with the same physical host and virtual guest.
I installed the xfce desktop environment (via tasksel) and I uninstalled all lxqt packages. I disabled the snap user service start (from the xfce session configuration panel).
Then, the cold start of the deb package application is down in less than 2 seconds (better). Maybe de xfce desktop environment already loaded a few libraries (libgtk-3-0, ...).
In addition, I measured the used memory (free -k) by comparing the "used" memory field before launch and a few seconds after the window appeared.
With deb package application : 266 MB.
With snap package application : 397 MB (+49%).
It seems the deb package application saves memory because it is sharing the libraries with the other applications of the desktop.
Note that I didn't count the used memory by the snap machinery (in case you wouldn't install snapd with a deb package application).

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Title:
  missing a tightly integrated deb package without snap

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