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From: Mild Shock <janburse@fastmail.fm>
Newsgroups: comp.lang.prolog
Subject: Re: A PIP classification scheme is needed (Was: DCG restrictions on
 the left-hand side [Novacore])
Date: Tue, 13 Aug 2024 11:23:02 +0200
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The PIP 903: Partial strings wasn't
so successful yet. Although pursued by
two Prolog systems, Scryer Prolog

and Trealla Prolog, the results are
not a banger performance wise. Could
have to do with some DCG pipe dreams:

/* Scryer Prolog 0.9.4-135 */
?- time((between(1,1000,_), data(X), json_chars(Y,X,[]), fail; true)).
    % CPU time: 0.283s, 2_506_022 inferences
    true.

/* Trealla Prolog 2.55.19 */
?- time((between(1,1000,_), data(X), json_chars(Y,X,[]), fail; true)).
% Time elapsed 0.235s, 2568003 Inferences, 10.937 MLips
    true.

/* Dogelog Player for Java 1.2.1 */
?- time((between(1,1000,_), data(X), json_atom(Y,X), fail; true)).
% Zeit 40 ms, GC 0 ms, Lips 12502725, Uhr 13.08.2024 08:43
true.

/* SWI-Prolog 9.3.8 */
?- time((between(1,1000,_), data(X), atom_json_term(X,Y,[]), fail; true)).
% 44,998 inferences, 0.016 CPU in 0.006 seconds (281% CPU, 2879872 Lips)
true.

Bye

Mild Shock schrieb:
> .
> Hi,
> 
> SARS-CoV-2 variant are classified as variant under
> monitoring (VUM), variant of interest (VOI)
> and variant of concern (VOC).
> 
> How would we classify PIPs. Here is a list:
> 
> - PIP 701: Tasks
> Stackfull and stackless cooperative cooroutines.
> 
> - PIP 702: Events
> An event loop to “asyncify” file system access, network
> access, queues, terminals, windowing systems, etc…
> 
> - PIP 801: Threads
> Split off from Paulo Maura’s multi-threading document.
> 
> - PIP 801: Mutex
> Split off from Paulo Maura’s multi-threading document.
> 
> - PIP 802: Message queues for multi-threading
> Split off from Paulo Maura’s multi-threading document.
> 
> - PIP 803: Simpler queues not for multi-threading (@marco’s ?)
> Other sources here.
> 
> - PIP 901: Embrace strings
> String literal, unify, (==)/2 and (@<)/2
> 
> - PIP 902: Fully embrace strings
> String is/2, (=:=)/2 and (<)/2
> 
> - PIP 903: Partial strings
> Compact and shared char lists.
> 
> Bye
> 
> Mild Shock schrieb:
>> Guess how many newer Prolog systems allow this here:
>>
>> ?- [user].
>> p;q --> r.
>>     true.
>>
>> On the other hand SWI-Prolog disallows it:
>>
>> ?- [user].
>> p;q --> r.
>>
>> ERROR: user://1:29:
>> ERROR:    No permission to define dcg_nonterminal `p;q'
>