Fedora 23 cloud image (and, for that matter, minimal anything) bloat

[Matej Stuchlik]

----- Original Message -----
> From: "Ville Skyttä" <ville.skytta at iki.fi>
> To: "Development discussions related to Fedora" <devel at lists.fedoraproject.org>
> Sent: Tuesday, September 22, 2015 1:36:09 PM
> Subject: Re: Fedora 23 cloud image (and, for that matter,	minimal anything) bloat
> 
> On Tue, Sep 22, 2015 at 2:25 PM, Neal Gompa <ngompa13 at gmail.com> wrote:
> > On Tue, Sep 22, 2015 at 5:36 AM, Matej Stuchlik <mstuchli at redhat.com>
> > wrote:
> >>
> >> Also note that it's possibly not just 9MB. For instance python3-boto, also
> >> on this list, would
> >> save 4.7MB, python3-pip 2.9MB. In general most python packages could go
> >> down in size by ~20-30%.
> >
> > However, this approach would break with Python 3.5 (where pyo data is
> > merged
> > into *.pyc data)
> 
> To be more precise, AFAIU there's no "merging", *.pyo goes away but in
> exchange there are actually two new optimized bytecode files,
> *.opt-1.pyc and *.opt-2.pyc: https://www.python.org/dev/peps/pep-0488/
> If you want to exclude them from packages, they should be there listed
> as %ghost so they're removed in case they get generated by something
> run with -O or -OO. Ditto *.pyo if you intend to exclude them from
> python < 3.5 packages.
> 
> Also, be careful with measuring space savings when working with *.pyo.
> It is a common case that *.pyc and *.pyo are identical, and when they
> are rpmbuild already hardlinks them.

That's really interesting, I've had no idea:

% find /usr/ -name "*.pyc" | wc -l
# All .pyc files
18376

% find /usr/ -name "*.pyc" -links +1 | wc -l
# .pyc files that are hard linked
15761

find /usr/ -name '*.pyc' -links 1 -print0 | du --files0-from=- -ch | tail -n1
# Total size of non-hardlinked .pyc files
65M	total

If I'm correct here it looks like it wouldn't really be worth it.

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