From: utzoo!decvax!microsof!uw-beave!ubc-visi!ubc-medg!unc!duke!harpo!ihnp4!ihldt!ll1!sb1!mb2b!uofm-cv!paul Newsgroups: net.lang.prolog,net.wanted Title: Availability of prolog? Article-I.D.: uofm-cv.107 Posted: Fri Dec 10 12:25:16 1982 Received: Mon Feb 21 05:12:41 1983 I noticed the existence of the prolog net. Can anyone out there bring us up to date on prolog availabilty for 4.1bsd prolog, especially in C or Pascal? The Computer Science department here is interested in things like compiler implementation in prolog, type inference, and AI applications. We have an Amdahl 580 which will soon host a non-portable version of prolog, but we would like one on our Unix system as well. >From duke!decvax!harpo!zeppo!whuxk!houxm!ihnp4!ixn5c!inuxc!pur-ee!uiucdcs!marcel Fri Dec 10 18:27:18 1982 Subject: Prolog performance comparisons - (nf) Newsgroups: net.lang.prolo #N:uiucdcs:29700001:000:1038 uiucdcs!marcel Dec 10 17:29:00 1982 To those wanting to hear of comparisons between various Prologs the Digital Computing Lab at U of Illinois/Urbana has several systems. The following figures are by courtesy of Scott Renner. They apply to a quicksort of 30 elements. Ident Machine Loading system Execute program & program Edinburgh DEC-10 1.3 sec 35 Kb 1.2 sec 47 Kb Waterloo VAX 0.7 sec 17 Kb 0.6 sec 24 Kb Micro-Prolog Z-80 10-12 sec 15 Kb 2.9 sec 28 Kb Belgian CYBER 0.08 sec 21 Kb 1.4 sec 21 Kb CProlog VAX 1.8 sec 21 Kb 0.7 sec 25 Kb And for those interested in the debate over relative speeds of compiled LISP vs compiled Prolog, there is a paper in the 1982 ACM Symposium on LISP and Functional Programming which presents evidence that compiled LISP is frequently twice as fast as compiled Prolog !! Marcel Schoppers University of Illinois at Urbana-Champaign Department of Computer Science 222 Digital Computing Lab 1304 W Springfield Ave Urbana, IL 61801. ph (217) 333-0643 (office)