How to reduce flatpak app size?

[Muayyad AlSadi]

I guess the VSCode and alike require SDK runtime (having compiler, headers
..etc) which is like *-devel host packages
snap does not ship those


On Mon, Aug 6, 2018 at 11:37 AM Alexander Larsson <alexl at redhat.com> wrote:

> On Thu, Jul 12, 2018 at 9:05 AM, Mike Spadaru <maspadaru at gmail.com> wrote:
> > Dear Flatpak community,
> >
> > I attempted a small experiment to benchmark Snap and Flatpak. On
> > Ubuntu 16.04 I picked some apps: Spotify, VSCode, Telegram-Desktop,
> > Gimp, Android-Studio. I performed three tests Native (via apt, .deb or
> > PPA), Snap and Flatpak. In each test I would read the used disk space,
> > install an app, run the app and perform a task (same task in each
> > test), then read the used disk space again. Before moving to the next
> > test, I uninstalled all the apps and removed any config files created.
> >
> > The machine uses only one disk partition. I also recorded CPU, RAM and
> > Power consumption, but there was no clear difference between the three
> > package formats.  My results for the disk usage are shown bellow.
> > Values are in mega-bytes:
> >
> > | App | Native | Snap | Flatpak |
> > | Spotify | 240 | 290 | 980 |
> > | VSCode | 270 | 220 | 1030 |
> > | Telegram | 80 | 100 | 600 |
> > | Gimp | 80 | 200 | 450 |
> > | Android Studio | 3290 | 3330 | 5930 |
>
> This is not really a fair comparison. You already have basically all
> the dependencies of the native packages installed, so installing just
> the app is just going to measure the app itself, whereas the flatpak
> application will download the dependencies (the runtime) in addition
> to the app.
> The same happens for snap, i.e. since you're on ubuntu it will already
> have installed the ubuntu core snap, so you're not counting that space
> against the app.
>
> Also, the values you get seem to imply that you're starting from
> scratch downloading the runtimes for each flatpak application, but
> most apps share the runtimes so if you were to install all the
> flatpaks at the same time the total size would not add up to the sum
> of your measured sizes.
>
> A better test of snap/flatpak might be to first remove all of snapd,
> including all snaps (thus also the core snap), then measure the free
> space, install snapd + al* the above snaps and compare the free size
> with before. Then do the same with all flatpaks in one install.
> That way you will count shared things only once, and accurately
> include the size of the snap base in the comparison.
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