Ludovic Courtès <ludo@gnu.org> writes:

> Hi!
>
> "Antoine R. Dumont (@ardumont)" <ardumont@softwareheritage.org> skribis:
>
>> |-----------+-------------+----------+----------|
>> | Iteration | Host System | Time (s) | Packages |
>> |-----------+-------------+----------+----------|
>> | 1st       | Debian      |   121.88 |      284 |
>> |           | Guix System |   413.55 |      749 |
>> |-----------+-------------+----------+----------|
>> | 2nd       | Debian      |      1.3 |      101 |
>> |           | Guix System |    11.54 |      354 |
>> |-----------+-------------+----------+----------|
>
> Ah, that’s a significant difference.
>
> I guess we can keep both methods: the exhaustive one that goes over all
> packages, and the quick one.  Then we can have a switch to select the
> method.
>
> Typically, we may want to use the expensive one on the build farm to
> publish a full database, while on user’s machines we may want to default
> to the cheaper one.
>
>>> Oh, and progress bars too.
>>
>> I'm a bit unsettled on this. Hopefully it was mostly a joke ;)
>
> It wasn’t.  :-)
>
> In the manifest case, we get ‘all-profiles’ is almost instantaneous, so
> we immediately known the number of manifests we’ll be working on.
>
> In the package case, the number of packages is known ahead.
>
> The (guix progress) module provides helpers.
>
> But anyway, that’s more like icing on the cake, we can leave that for
> later.
>
> Thanks,
> Ludo’.