From: Pierre Neidhardt <mail@ambrevar.xyz>
To: Ricardo Wurmus <rekado@elephly.net>
Cc: guix-devel@gnu.org
Subject: Re: File search progress: database review and question on triggers
Date: Thu, 13 Aug 2020 12:04:49 +0200 [thread overview]
Message-ID: <87a6yyeu9q.fsf@ambrevar.xyz> (raw)
In-Reply-To: <87sgcq3n50.fsf@elephly.net>
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Hi Ricardo,
See my recent email with the new SQLite benchmark: I can now generate
the whole database in under 30 seconds, so about the same order of
magnitude than a naive text database (which has a less data).
SQLite pattern search queries are extremely fast (<0.1s) and cover all
examples named so far:
- exact basename match
- partial path match
- pattern match (e.g. "/include/%foo%")
The only thing that's missing is regexp support. I'll see what we can do.
Considering this, I find that leveraging SQLite is very attractive at
this point:
- Fast (fastest?).
- Low on memory.
- No need to come up with our own data format.
- Less work, no need to reinvent the wheel.
>> - It does not cover the case where I don't know the basename, e.g. if I'm
>> looking for a FOO header file my query would look like "/include/.*foo.*".
>
> I think this is a rather rare use case, which in my opinion doesn’t
> justify forgoing the use of a smart data structure.
I don't find it so rare, actually. I've used filesearch (on other OSes)
to find
- Emacs packages where I didn't know the exact name of the .el.
- TeXlive packages (every time you get a font a .sty error)
- Shared libraries (.so of which I didn't know the exact name)
- include files as above
- Your favourite programming language package...
> It would *still* be possible to use the prefix tree for this kind of
> search, but it would certainly not be optimal. (E.g. by searching up
> to the first wildcard, and then searching each resulting sub-tree up
> to the first non-wildcard, and resuming the search in all remaining
> sub-trees.)
But it's not a wildcard, it's a regexp. Can we run full-path regexp queries
over a trie?
>> I believe it's important that the search be as general as possible.
>
> Search should be cheap and fast.
While very important, I would put more priority on exactness. A search
which gives unreliable results (e.g. returns nothing while there exists
a result) is a search that would deter many users from using it, in my
experience.
Cheers!
--
Pierre Neidhardt
https://ambrevar.xyz/
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next prev parent reply other threads:[~2020-08-13 10:05 UTC|newest]
Thread overview: 73+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-10 14:32 File search progress: database review and question on triggers Pierre Neidhardt
2020-08-11 9:43 ` Mathieu Othacehe
2020-08-11 12:35 ` Pierre Neidhardt
2020-08-15 12:48 ` Hartmut Goebel
2020-08-11 15:43 ` Ricardo Wurmus
2020-08-11 17:54 ` Pierre Neidhardt
2020-08-11 17:58 ` Pierre Neidhardt
2020-08-11 20:08 ` Ricardo Wurmus
2020-08-12 19:10 ` Pierre Neidhardt
2020-08-12 20:13 ` Julien Lepiller
2020-08-12 20:43 ` Pierre Neidhardt
2020-08-12 21:29 ` Julien Lepiller
2020-08-12 22:29 ` Ricardo Wurmus
2020-08-13 6:55 ` Pierre Neidhardt
2020-08-13 6:52 ` Pierre Neidhardt
2020-08-13 9:34 ` Ricardo Wurmus
2020-08-13 10:04 ` Pierre Neidhardt [this message]
2020-08-15 12:47 ` Hartmut Goebel
2020-08-15 21:20 ` Bengt Richter
2020-08-16 8:18 ` Hartmut Goebel
2020-08-12 20:32 ` Pierre Neidhardt
2020-08-13 0:17 ` Arun Isaac
2020-08-13 6:58 ` Pierre Neidhardt
2020-08-13 9:40 ` Pierre Neidhardt
2020-08-13 10:08 ` Pierre Neidhardt
2020-08-13 11:47 ` Ricardo Wurmus
2020-08-13 13:44 ` Pierre Neidhardt
2020-08-13 12:20 ` Arun Isaac
2020-08-13 13:53 ` Pierre Neidhardt
2020-08-13 15:14 ` Arun Isaac
2020-08-13 15:36 ` Pierre Neidhardt
2020-08-13 15:56 ` Pierre Neidhardt
2020-08-15 19:33 ` Arun Isaac
2020-08-24 8:29 ` Pierre Neidhardt
2020-08-24 10:53 ` Pierre Neidhardt
2020-09-04 19:15 ` Arun Isaac
2020-09-05 7:48 ` Pierre Neidhardt
2020-09-06 9:25 ` Arun Isaac
2020-09-06 10:05 ` Pierre Neidhardt
2020-09-06 10:33 ` Arun Isaac
2020-08-18 14:58 ` File search progress: database review and question on triggers OFF TOPIC PRAISE Joshua Branson
2020-08-27 10:00 ` File search progress: database review and question on triggers zimoun
2020-08-27 11:15 ` Pierre Neidhardt
2020-08-27 12:56 ` zimoun
2020-08-27 13:19 ` Pierre Neidhardt
2020-09-26 14:04 ` Pierre Neidhardt
2020-09-26 14:12 ` Pierre Neidhardt
2020-10-05 12:35 ` Ludovic Courtès
2020-10-05 18:53 ` Pierre Neidhardt
2020-10-09 21:16 ` zimoun
2020-10-10 8:57 ` Pierre Neidhardt
2020-10-10 14:58 ` zimoun
2020-10-12 10:16 ` Ludovic Courtès
2020-10-12 11:18 ` Pierre Neidhardt
2020-10-13 13:48 ` Ludovic Courtès
2020-10-13 13:59 ` Pierre Neidhardt
2020-10-10 16:03 ` zimoun
2020-10-11 11:19 ` Pierre Neidhardt
2020-10-11 13:02 ` zimoun
2020-10-11 14:25 ` Pierre Neidhardt
2020-10-11 16:05 ` zimoun
2020-10-12 10:20 ` Ludovic Courtès
2020-10-12 11:21 ` Pierre Neidhardt
2020-10-13 13:45 ` Ludovic Courtès
2020-10-13 13:56 ` Pierre Neidhardt
2020-10-13 21:22 ` Ludovic Courtès
2020-10-14 7:50 ` Pierre Neidhardt
2020-10-16 10:30 ` Ludovic Courtès
2020-10-17 9:14 ` Pierre Neidhardt
2020-10-17 19:17 ` Pierre Neidhardt
2020-10-21 9:53 ` Ludovic Courtès
2020-10-21 9:58 ` Pierre Neidhardt
2020-10-12 11:23 ` zimoun
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