Re: Misc Developer News (#60)
* Soren Stoutner <soren@debian.org> [241125 18:30]:
> > > In principle, unshare mode can also work with directories. Helmut is
> working
> > > on something in that direction. But for me personally, one second of
> unpack
> > > time is not enough of a motivation for me to put time into
> > > directory+overlayfs support. But of course patches welcome!
> >
> > Yes, one second is not that bad at all. It takes longer than that on
> > the porterboxes, and that is my most recent experience, so I was
> > thinking of that. Thanks for the timings.
>
> I haven’t had time to do any analysis myself, but there is some information
> posted on https://wiki.debian.org/sbuild:
>
> >You can use choose the compression algorithm for the tarball by specifying
> the extension (.tar.xz, .tar.gz or plain .tar, etc). As of May 2024, ZST seems
> to provide the best size/time ratio. It certainly is the fastest on a Dell
> Precision 3800M, 16GB RAM, on an SSD drive (a computer from early 2015):
> >
> >Format Tarball size Time
> >
> >.xz ~100MB 179,60s user 7,09s system 75% cpu 4:07,49 total
> >.gz ~150MB 38,51s user 6,13s system 83% cpu 53,423 total
> >.zst ~139MB 22,68s user 6,28s system 74% cpu 38,868 total
IIRC these times are for tarball creation (incl. downloading and
apt). Unpacking is AFAICT a lot faster in many cases. Locally it
feels like <1s.
Chris
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