GNU bug report logs - #74748
Constructor created by define-configuration is slow (>25s) when many fields are defined

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Message #14 received at 74748 <at> debbugs.gnu.org (full text, mbox):

From: Ludovic Courtès <ludo <at> chbouib.org>
To: Tomas Volf <~@wolfsden.cz>
Cc: Ludovic Courtès <ludo <at> gnu.org>, 74748 <at> debbugs.gnu.org
Subject: Re: bug#74748: Constructor created by define-configuration is slow
 (>25s) when many fields are defined
Date: Tue, 15 Apr 2025 10:25:39 +0200

Hi,

Tomas Volf <~@wolfsden.cz> writes:

> I admit I did not test the patch attached, but my understanding is that
> even if the speed up was sufficient, it would take effect only for
> compilation via the make command.

No, (guix build compile) is also used by (guix self), which is what
‘guix pull’ & co. use.

I pushed the patch as 5b158ddca9425d79ea4ceb374003fe0f7e6bd336, it can
only be beneficial.

> The actual problem for me was the slowness in REPL.  Would that be
> addressed by the patch above?  If not, do we have any way to do that?

At the REPL you could type:

  ,o optimization-level 1

You could use ‘repl-option-set!’ from ~/.guile somehow I guess.

Thanks,
Ludo’.

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