Re: Is old school mode directed compilation dead? (Was: thank you for the FLOPs)

Hi,
Would need more testing but the
present example is immune:
/* SWI-Prolog 9.3.19 */
?- X = f(g(1),h(2)), time((between(1,1000000,_), test1(X, Y), fail; true)).
% 1,999,998 inferences, 0.094 CPU in 0.100 seconds (93% CPU, 21333312 Lips)
?- X = f(g(1),h(2)), time((between(1,1000000,_), test2(X, Y), fail; true)).
% 1,999,998 inferences, 0.094 CPU in 0.100 seconds (93% CPU, 21333312 Lips)
?- Y = j(1,2), time((between(1,1000000,_), test1(X, Y), fail; true)).
% 1,999,998 inferences, 0.109 CPU in 0.100 seconds (109% CPU, 18285696 Lips)
?- Y = j(1,2), time((between(1,1000000,_), test2(X, Y), fail; true)).
% 1,999,998 inferences, 0.094 CPU in 0.102 seconds (92% CPU, 21333312 Lips)
Not all Prolog systems are that lucky:
/* Scryer Prolog 0.9.4-286 */
?- X = f(g(1),h(2)), time((between(1,1000000,_), test1(X, Y), fail; true)).
    % CPU time: 1.163s, 11_000_108 inferences
?- X = f(g(1),h(2)), time((between(1,1000000,_), test2(X, Y), fail; true)).
    % CPU time: 1.248s, 11_000_131 inferences
?- Y = j(1,2), time((between(1,1000000,_), test1(X, Y), fail; true)).
    % CPU time: 0.979s, 11_000_131 inferences
?- Y = j(1,2), time((between(1,1000000,_), test2(X, Y), fail; true)).
    % CPU time: 1.338s, 11_000_131 inferences
Bye
Mild Shock schrieb:

Hi,
 Just noticed that SICStus Prolog says that
their mode declaration is a dummy declaration,
does nothing. Now I tried whether I can force
 SWI Prolog to accept different manually compiled clauses:
 test1(X,Y) :- Y = j(C,D), g(C) = A, h(D) = B, f(A,B) = X.
 test2(X,Y) :- X = f(A,B), A = g(C), B = h(D), j(C,D) = Y.
 Difficult to archive in SWI-Prolog, since it
orders unification on its own, test1/2 and test2/2
will behave the same, since they are essentially the same:
 /* SWI-Prolog 9.3.19 */
?- listing(test1/2), listing(test2/2).
test1(f(A, B), j(C, D)) :-
     A=g(C),
     B=h(D).
 test2(f(A, B), j(C, D)) :-
     A=g(C),
     B=h(D).
 But maybe not necessary since SWI-Prolog has an
advanced instruction set and advanced Prolog
logical variable representation?
 Bye
 Mild Shock schrieb:

Hi,
>
Given that Scryer Prolog is dead.
This made me smile, traces of Scryer Prolog
>
are found in FLOPs 2024 proceedings:
>
7th International Symposium, FLOPS 2024,
Kumamoto, Japan, May 15–17, 2024, Proceedings
https://www.cs.ox.ac.uk/jeremy.gibbons/flops2024.pdf
>
So why did it flop? Missing garbage collection
in the Prolog System? Or did or is it to estimate
that ChatGPT will also kill Scryer Prolog?
>
Or simply a problem of using Rust as the
underlying host language?
>
Bye