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From: "Mattias Waldau" <mattias.waldau@abc.se>
To: "'Vitaly Lugovsky'" <vsl@ontil.ihep.su>
Cc: <erayo@cs.bilkent.edu.tr>, "'Ocaml Mailing List'" <caml-list@inria.fr>
Subject: RE: [Caml-list] Efficiency of 'a list
Date: Sat, 3 May 2003 20:43:41 +0200	[thread overview]
Message-ID: <03ea01c311a3$ee573560$0200a8c0@gateway> (raw)
In-Reply-To: <Pine.LNX.4.53L.0305031811210.7172@ontil.ihep.su>

*** Do not use lists, there is always a better datastructure *** 

> From: Vitaly Lugovsky [mailto:vsl@ontil.ihep.su] 
>  OCaml already have Hashtbl implementation.

I know Ocaml has hash tables. Ocaml has ALL the datastructures that are
needed to create efficient programs. However, lists are the data
structure that it easiest to use, since there is special syntax for it,
and therefor many novices use it.

The result of this is that you get all these questions in this forum
complaining about performance. Most of the questions would never have
been asked if the author would have used the correct datastructure,
mostly Hash/Map or Set.

The reason novices use them is that they think that since there is
special syntax for lists, this must be the preferred way. We all know
that it isn't the preferred solution.

I have been doing pure programming since MACLISP on the TOPS-20, and the
a large percentage of performance problems can be traced back to
IMAPPROPRIATE USE OF LISTS. Therefor my previous post where I
essentially say:

*** Do not use lists, there is always a better datastructure *** 


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  reply	other threads:[~2003-05-03 18:44 UTC|newest]

Thread overview: 42+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2003-05-02 19:27 Eray Ozkural
2003-05-03  5:43 ` Mattias Waldau
2003-05-03  8:16   ` Ville-Pertti Keinonen
2003-05-03 14:12   ` Vitaly Lugovsky
2003-05-03 18:43     ` Mattias Waldau [this message]
2003-05-03 20:01       ` Eray Ozkural
2003-05-03 23:17       ` Eray Ozkural
2003-05-04  2:08       ` cashin
2003-05-04  4:08         ` alc
2003-05-04  5:32           ` Ed L Cashin
2003-05-04  6:46           ` [Caml-list] Two types of efficiency (Was Efficiency of 'a list) Mattias Waldau
2003-05-04  7:35             ` John Max Skaller
2003-05-04 11:52               ` Olivier Andrieu
2003-05-05 11:04                 ` John Max Skaller
2003-05-04 16:48               ` brogoff
2003-05-04  7:43             ` Ville-Pertti Keinonen
2003-05-04 12:50               ` Eray Ozkural
2003-05-04 12:48             ` Eray Ozkural
2003-05-05  7:31             ` Diego Olivier Fernandez Pons
2003-05-05 11:11               ` Mattias Waldau
2003-05-05 13:17                 ` John Max Skaller
2003-05-05 11:49               ` Eray Ozkural
2003-05-05 11:57               ` Yaron M. Minsky
2003-05-05 13:32                 ` John Max Skaller
2003-05-06  2:49                   ` Nicolas Cannasse
2003-05-06 12:30                     ` Diego Olivier Fernandez Pons
2003-05-07  2:05                       ` Nicolas Cannasse
2003-05-05 16:38                 ` Diego Olivier Fernandez Pons
2003-05-05 18:05                   ` Eray Ozkural
2003-05-06 13:28                     ` Diego Olivier Fernandez Pons
2003-05-13 11:35                   ` [Caml-list] Data Structure Libraries (was: Two types of efficiency) Oleg Trott
2003-05-04  7:55           ` [Caml-list] Efficiency of 'a list Ville-Pertti Keinonen
2003-05-04 10:56             ` Neel Krishnaswami
2003-05-04 12:56               ` Eray Ozkural
2003-05-04 13:35                 ` Falk Hueffner
2003-05-04 12:38           ` Eray Ozkural
2003-05-04  8:07         ` Ville-Pertti Keinonen
2003-05-04 15:54           ` Ed L Cashin
2003-05-05 23:52           ` Garry Hodgson
2003-05-03 20:03   ` Eray Ozkural
2003-05-03 21:13 ` Lauri Alanko
2003-05-03 22:03   ` Eray Ozkural

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