Re: guix package --search slow ?

[zimoun <zimon.toutoune@gmail.com>]

Hi Pierre,

On Wed, 15 May 2019 at 16:08, Pierre Neidhardt <mail@ambrevar.xyz> wrote:
>
> > Another idea would be to have some kind of simple search which only
> > includes the package name and maybe the synopsis.
>
> For Emacs users, it's what helm-system-packages does.  It implements its
> own names+synopses cache.  helm-system-packages takes some seconds on
> first start to build the cache; after that you get instant live search! :)

You are doing ads for your package ;-)

Well, I cite your doctring [1], that's the point.

Guix is extremely slow to list everything, thus the cache is
persisted on drive. It's only updated whenever
`helm-system-packages-guix--last-pull-commits' is different from the
cache commit.

And what do mean by this comment [2]

;; We build both caches at the same time. We could also build just-in-time, but
;; benchmarks show that it only saves less than 20% when building one cache.



Last, the "slowness" comes from `guix package --search` doing there
[3], I guess.


What is the size of the persistent cache?



[1] https://github.com/emacs-helm/helm-system-packages/blob/master/helm-system-packages-guix.el#L141
[2] https://github.com/emacs-helm/helm-system-packages/blob/master/helm-system-packages-guix.el#L148
[3] https://github.com/emacs-helm/helm-system-packages/blob/master/helm-system-packages-guix.el#L163


Cheers,
simon