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Groups > comp.lang.c > #167156
| Newsgroups | comp.lang.c |
|---|---|
| Date | 2022-08-23 10:07 -0700 |
| References | <d8294420-7b45-4344-b9eb-0ad867850ec6n@googlegroups.com> <868rneuco0.fsf@linuxsc.com> |
| Message-ID | <93c78669-e681-48bf-b421-ff199e5fcf7an@googlegroups.com> (permalink) |
| Subject | Re: How to optimize this search? |
| From | Thiago Adams <thiago.adams@gmail.com> |
On Tuesday, August 23, 2022 at 1:50:53 PM UTC-3, Tim Rentsch wrote:
> Thiago Adams <thiago...@gmail.com> writes:
>
> > Given a c string I need to return as fast as possible the pair (if
> > exist) of the corresponding keyword_pair.
> >
> >
> > struct keyword_pair{
> > const char* lexeme;
> > int token;
> > };
> >
> > struct keyword_pair[] = {
> > { "NULL", 0},
> > { "_Alignas", 1},
> > [...]
> > { "volatile", 73},
> > { "while", 74},
> > };
> There is no way to give a good answer to this question without more
> information, as for example how often does a query result in a miss
> rather than a hit, and what is the expected distribution of queries
> that result in a hit. And there are other factors that could play a
> major role in making good choices for this.
>
> Also, it seems likely that a better way to approach this problem is
> to change the callers (or at least some of them) so that they
> provide more information than just a pointer to a string. For
> example, if this is to be part of a scanner, then it should be
> possible without too much difficult to compute a hash as the
> identifier is scanned, and also a length. Both of those could
> help speed up the keyword lookup code.
Imagine the input is a C identifier.
Things like "void" "int" "struct" "enum" are common keywords , very frequent.
Things like "i" "j" "k" are common not keywords.
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How to optimize this search? Thiago Adams <thiago.adams@gmail.com> - 2022-08-22 07:17 -0700
Re: How to optimize this search? Thiago Adams <thiago.adams@gmail.com> - 2022-08-22 07:34 -0700
Re: How to optimize this search? scott@slp53.sl.home (Scott Lurndal) - 2022-08-22 16:17 +0000
Re: How to optimize this search? Thiago Adams <thiago.adams@gmail.com> - 2022-08-22 09:24 -0700
Re: How to optimize this search? Thiago Adams <thiago.adams@gmail.com> - 2022-08-22 09:38 -0700
Re: How to optimize this search? scott@slp53.sl.home (Scott Lurndal) - 2022-08-22 17:03 +0000
Re: How to optimize this search? Anton Shepelev <anton.txt@g{oogle}mail.com> - 2022-08-23 14:58 +0300
Re: How to optimize this search? Thiago Adams <thiago.adams@gmail.com> - 2022-08-23 05:02 -0700
Re: How to optimize this search? Anton Shepelev <anton.txt@g{oogle}mail.com> - 2022-08-23 17:50 +0300
Re: How to optimize this search? Ben Bacarisse <ben.usenet@bsb.me.uk> - 2022-08-23 16:58 +0100
Re: How to optimize this search? Anton Shepelev <anton.txt@g{oogle}mail.com> - 2022-08-23 19:21 +0300
Re: How to optimize this search? Thiago Adams <thiago.adams@gmail.com> - 2022-08-23 09:46 -0700
Re: How to optimize this search? Anton Shepelev <anton.txt@g{oogle}mail.com> - 2022-08-23 20:06 +0300
Re: How to optimize this search? Ben Bacarisse <ben.usenet@bsb.me.uk> - 2022-08-23 23:39 +0100
Re: How to optimize this search? Anton Shepelev <anton.txt@g{oogle}mail.com> - 2022-08-24 11:20 +0300
Re: How to optimize this search? Anton Shepelev <anton.txt@gmail.com> - 2022-08-25 00:52 +0300
Re: How to optimize this search? Ben Bacarisse <ben.usenet@bsb.me.uk> - 2022-08-24 23:23 +0100
Re: How to optimize this search? Anton Shepelev <anton.txt@gmail.com> - 2022-08-26 01:38 +0300
Re: How to optimize this search? Ben Bacarisse <ben.usenet@bsb.me.uk> - 2022-08-26 00:55 +0100
Re: How to optimize this search? Anton Shepelev <anton.txt@g{oogle}mail.com> - 2022-08-26 12:02 +0300
Re: How to optimize this search? bart c <bart4858@gmail.com> - 2022-08-26 04:10 -0700
Re: How to optimize this search? Thiago Adams <thiago.adams@gmail.com> - 2022-08-22 10:47 -0700
Re: How to optimize this search? scott@slp53.sl.home (Scott Lurndal) - 2022-08-22 18:10 +0000
Re: How to optimize this search? bart c <bart4858@gmail.com> - 2022-08-22 15:22 -0700
Re: How to optimize this search? Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2022-08-22 15:37 -0700
Re: How to optimize this search? bart c <bart4858@gmail.com> - 2022-08-22 16:28 -0700
Re: How to optimize this search? Ben Bacarisse <ben.usenet@bsb.me.uk> - 2022-08-23 01:18 +0100
Re: How to optimize this search? bart c <bart4858@gmail.com> - 2022-08-22 18:01 -0700
Re: How to optimize this search? antispam@math.uni.wroc.pl - 2022-08-23 00:07 +0000
Re: How to optimize this search? bart c <bart4858@gmail.com> - 2022-08-22 18:12 -0700
Re: How to optimize this search? antispam@math.uni.wroc.pl - 2022-08-23 01:54 +0000
Re: How to optimize this search? David Brown <david.brown@hesbynett.no> - 2022-08-23 08:50 +0200
Re: How to optimize this search? bart c <bart4858@gmail.com> - 2022-08-23 04:18 -0700
Re: How to optimize this search? David Brown <david.brown@hesbynett.no> - 2022-08-23 15:50 +0200
Re: How to optimize this search? antispam@math.uni.wroc.pl - 2022-08-22 18:51 +0000
Re: How to optimize this search? Ben Bacarisse <ben.usenet@bsb.me.uk> - 2022-08-22 16:34 +0100
Re: How to optimize this search? Thiago Adams <thiago.adams@gmail.com> - 2022-08-22 09:14 -0700
Re: How to optimize this search? Ben Bacarisse <ben.usenet@bsb.me.uk> - 2022-08-22 17:33 +0100
Re: How to optimize this search? Siri Cruise <chine.bleu@yahoo.com> - 2022-08-22 08:44 -0700
Re: How to optimize this search? Ben Bacarisse <ben.usenet@bsb.me.uk> - 2022-08-22 16:53 +0100
Re: How to optimize this search? Siri Cruise <chine.bleu@yahoo.com> - 2022-08-22 09:29 -0700
Re: How to optimize this search? Ben Bacarisse <ben.usenet@bsb.me.uk> - 2022-08-22 17:36 +0100
Re: How to optimize this search? Ben Bacarisse <ben.usenet@bsb.me.uk> - 2022-08-22 16:53 +0100
Re: How to optimize this search? Thiago Adams <thiago.adams@gmail.com> - 2022-08-22 09:11 -0700
Re: How to optimize this search? antispam@math.uni.wroc.pl - 2022-08-22 19:30 +0000
Re: How to optimize this search? Thiago Adams <thiago.adams@gmail.com> - 2022-08-22 14:19 -0700
Re: How to optimize this search? Öö Tiib <ootiib@hot.ee> - 2022-08-22 14:36 -0700
Re: How to optimize this search? antispam@math.uni.wroc.pl - 2022-08-22 22:49 +0000
Re: How to optimize this search? Thiago Adams <thiago.adams@gmail.com> - 2022-08-23 05:13 -0700
Re: How to optimize this search? Thiago Adams <thiago.adams@gmail.com> - 2022-08-23 15:55 -0700
Re: How to optimize this search? bart c <bart4858@gmail.com> - 2022-08-23 16:36 -0700
Re: How to optimize this search? Thiago Adams <thiago.adams@gmail.com> - 2022-08-23 17:42 -0700
Re: How to optimize this search? Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2022-08-23 18:36 -0700
Re: How to optimize this search? bart c <bart4858@gmail.com> - 2022-08-24 03:34 -0700
Re: How to optimize this search? Thiago Adams <thiago.adams@gmail.com> - 2022-08-24 04:40 -0700
Re: How to optimize this search? David Brown <david.brown@hesbynett.no> - 2022-08-24 09:30 +0200
Re: How to optimize this search? William Ahern <william@25thandClement.com> - 2022-08-24 12:36 -0700
Re: How to optimize this search? Bonita Montero <Bonita.Montero@gmail.com> - 2022-08-22 17:51 +0200
Re: How to optimize this search? Ben Bacarisse <ben.usenet@bsb.me.uk> - 2022-08-22 16:55 +0100
Re: How to optimize this search? Bonita Montero <Bonita.Montero@gmail.com> - 2022-08-22 18:14 +0200
Re: How to optimize this search? Thiago Adams <thiago.adams@gmail.com> - 2022-08-22 09:15 -0700
Re: How to optimize this search? Bonita Montero <Bonita.Montero@gmail.com> - 2022-08-22 18:28 +0200
Re: How to optimize this search? Thiago Adams <thiago.adams@gmail.com> - 2022-08-22 09:34 -0700
Re: How to optimize this search? Bonita Montero <Bonita.Montero@gmail.com> - 2022-08-22 18:35 +0200
Re: How to optimize this search? Thiago Adams <thiago.adams@gmail.com> - 2022-08-22 09:45 -0700
Re: How to optimize this search? Bonita Montero <Bonita.Montero@gmail.com> - 2022-08-22 18:51 +0200
Re: How to optimize this search? Anton Shepelev <anton.txt@g{oogle}mail.com> - 2022-08-23 17:53 +0300
Re: How to optimize this search? bart c <bart4858@gmail.com> - 2022-08-22 10:20 -0700
Re: How to optimize this search? Thiago Adams <thiago.adams@gmail.com> - 2022-08-22 10:53 -0700
Re: How to optimize this search? antispam@math.uni.wroc.pl - 2022-08-22 23:31 +0000
Re: How to optimize this search? bart c <bart4858@gmail.com> - 2022-08-22 17:04 -0700
Re: How to optimize this search? Tim Rentsch <tr.17687@z991.linuxsc.com> - 2022-08-23 09:50 -0700
Re: How to optimize this search? Thiago Adams <thiago.adams@gmail.com> - 2022-08-23 10:07 -0700
Re: How to optimize this search? bart c <bart4858@gmail.com> - 2022-08-23 11:28 -0700
Re: How to optimize this search? Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2022-08-23 12:17 -0700
Re: How to optimize this search? Thiago Adams <thiago.adams@gmail.com> - 2022-08-23 13:16 -0700
Re: How to optimize this search? bart c <bart4858@gmail.com> - 2022-08-23 13:18 -0700
Re: How to optimize this search? Thiago Adams <thiago.adams@gmail.com> - 2022-08-23 13:23 -0700
Re: How to optimize this search? Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2022-08-23 13:40 -0700
Re: How to optimize this search? bart c <bart4858@gmail.com> - 2022-08-23 16:26 -0700
Re: How to optimize this search? Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2022-08-23 16:50 -0700
Re: How to optimize this search? bart c <bart4858@gmail.com> - 2022-08-23 17:26 -0700
Re: How to optimize this search? antispam@math.uni.wroc.pl - 2022-08-23 23:54 +0000
Re: How to optimize this search? Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2022-08-23 17:16 -0700
Re: How to optimize this search? David Brown <david.brown@hesbynett.no> - 2022-08-24 09:43 +0200
Re: How to optimize this search? bart c <bart4858@gmail.com> - 2022-08-24 04:03 -0700
Re: How to optimize this search? antispam@math.uni.wroc.pl - 2022-08-24 14:15 +0000
Re: How to optimize this search? Ben Bacarisse <ben.usenet@bsb.me.uk> - 2022-08-24 13:28 +0100
Re: How to optimize this search? Thiago Adams <thiago.adams@gmail.com> - 2022-08-24 06:25 -0700
Re: How to optimize this search? Thiago Adams <thiago.adams@gmail.com> - 2022-08-24 06:50 -0700
Re: How to optimize this search? Ben Bacarisse <ben.usenet@bsb.me.uk> - 2022-08-24 15:19 +0100
Re: How to optimize this search? Thiago Adams <thiago.adams@gmail.com> - 2022-08-24 09:46 -0700
Re: How to optimize this search? Ben Bacarisse <ben.usenet@bsb.me.uk> - 2022-08-24 20:40 +0100
Re: How to optimize this search? Thiago Adams <thiago.adams@gmail.com> - 2022-08-24 10:08 -0700
Re: How to optimize this search? Ben Bacarisse <ben.usenet@bsb.me.uk> - 2022-08-24 20:42 +0100
Re: How to optimize this search? bart c <bart4858@gmail.com> - 2022-08-24 07:31 -0700
Re: How to optimize this search? Anton Shepelev <anton.txt@gmail.com> - 2022-08-25 01:04 +0300
Re: How to optimize this search? Thiago Adams <thiago.adams@gmail.com> - 2022-08-24 16:43 -0700
Re: How to optimize this search? Thiago Adams <thiago.adams@gmail.com> - 2022-08-24 16:54 -0700
Re: How to optimize this search? Thiago Adams <thiago.adams@gmail.com> - 2022-08-24 17:08 -0700
Re: How to optimize this search? Anton Shepelev <anton.txt@gmail.com> - 2022-08-26 01:47 +0300
Re: How to optimize this search? Thiago Adams <thiago.adams@gmail.com> - 2022-08-26 05:40 -0700
Re: How to optimize this search? Thiago Adams <thiago.adams@gmail.com> - 2022-08-26 06:29 -0700
Re: How to optimize this search? scott@slp53.sl.home (Scott Lurndal) - 2022-08-26 14:05 +0000
Re: How to optimize this search? bart c <bart4858@gmail.com> - 2022-08-24 06:45 -0700
Re: How to optimize this search? bart c <bart4858@gmail.com> - 2022-08-24 13:01 -0700
Re: How to optimize this search? Anton Shepelev <anton.txt@gmail.com> - 2022-08-25 01:17 +0300
Re: How to optimize this search? Ben Bacarisse <ben.usenet@bsb.me.uk> - 2022-08-24 23:38 +0100
Re: How to optimize this search? Anton Shepelev <anton.txt@g{oogle}mail.com> - 2022-08-25 11:29 +0300
Re: How to optimize this search? Anton Shepelev <anton.txt@g{oogle}mail.com> - 2022-08-25 11:33 +0300
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