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[bug#39258] [PATCH 2/4] ui: Use string matching with literal search stri
[bug#39258] [PATCH 2/4] ui: Use string matching with literal search strings.
Sat, 13 Jun 2020 21:32:37 +0200
Gnus/5.13 (Gnus v5.13) Emacs/26.3 (gnu/linux)
Arun Isaac <firstname.lastname@example.org> skribis:
>>> * guix/scripts/package.scm (process-query): Make search query a regexp only
>>> it is not a literal search string.
>>> * guix/ui.scm (relevance): Use string matching with literal search strings
>>> regexp matching with regexp search strings.
>> How does this affect performance?
(To be clear, I’m referring specifically to this patch.)
> See my results from earlier.
> time ./pre-inst-env guix search game
> real 0m2.261s
> user 0m2.351s
> sys 0m0.104s
> time guix search game
> real 0m2.661s
> user 0m2.843s
> sys 0m0.080s
>> I would expect the regexp engine in libc to do something similar
>> internally, so I wonder if the extra work in Scheme pays off.
> I agree it would better to do this optimization at the regexp engine, if
> it doesn't do it already.
Yeah. I feel like we shouldn’t have to do this, so I’d lean towards
excluding this patch from the series. It’s too early to be confident
about it, but it might be something as discussed in
i.e., a problem to solve at the Guile level.
> So, shall I push the remaining patches (patches 1, 3, 4) after applying
> the change you suggested for patch 1 (use of if versus cond)?