Re: Ready for Guile 2.2!

[Ludovic Courtès]

Hello Guix!

address@hidden (Ludovic Courtès) skribis:

> An unscientific illustration of this point:
>
> scheme@(guile-user)> ,use(guix scripts build)
> scheme@(guile-user)> ,time (guix-build "libreoffice" "certbot" "xmonad" "-n" 
> "--no-substitutes" "--no-build-hook")
> The following derivations would be built:
>
> [...]
>
> ;; 2.724686s real time, 3.117062s run time.  0.880827s spent in GC.
> scheme@(guile-user)> (version)
> $1 = "2.0.13"
>
>
> Compared to:
>
> scheme@(guile-user)> ,time (guix-build "libreoffice" "certbot" "xmonad" "-n" 
> "--no-substitutes" "--no-build-hook")
>
> [...]
>
> ;; 2.224821s real time, 2.347463s run time.  0.374545s spent in GC.
>
> Roughly an 18% speedup here.

In Guile 2.2.1 Andy fixed an optimization of ‘thunk?’, which is called a
lot when we load packages (via ‘make-promise’, for record fields marked
as ‘delayed’).  Now we get… drum roll…

--8<---------------cut here---------------start------------->8---
scheme@(guile-user)> ,use(guix scripts build)
scheme@(guile-user)> ,time (guix-build "libreoffice" "certbot" "xmonad" "-n" 
"--no-substitutes" "--no-build-hook")

[...]

;; 1.826528s real time, 1.994426s run time.  0.382750s spent in GC.
scheme@(guile-user)> (version)
$1 = "2.2.1"
--8<---------------cut here---------------end--------------->8---

That’s a 33% speedup compared to 2.0.

Andy super-hero!

Ludo’.