Re: Random idea about speeding up guix pull

[Ludovic Courtès]

Hartmut Goebel <address@hidden> skribis:

> Am 04.09.2017 um 23:56 schrieb Ludovic Courtès:
>> What it does do is maintain a cached checkout in ~/.cache/guix/pull,
>> which makes subsequent pulls much faster.
>
> Summary ( TL;DR):
>
>   * "guix pull" should use "git fetch master"
>   * "guix download" we can keep the current behaviour
>
> I did a series of tests
>
>   * - "fetch" without any argument will fetch *all* data from *all*
>     branches.
>   * - "fetch master" only fetches data living on "master", other
>     branches are ignored
>
> I compared the data fetched for a repo with status of 6bd1c41e8
> (yesterday 05:29):
>
>   * - "fetch" fetches 1000K
>   * - "fetch master" fetches 755K
>   * - "fetch --depth=1 master" fetches 588K (but see below)

Thanks for the detailed analysis!

The problem is that libgit2 doesn’t support shallow clones, and it’s
unclear whether it will support it in the future:

  https://github.com/libgit2/libgit2/issues/3058

:-/

Ludo’.