Path: utzoo!attcan!uunet!mcvax!unido!ecrcvax!micha
From: micha@ecrcvax.UUCP (Micha Meier)
Newsgroups: comp.lang.prolog
Subject: Re: "A Note on the Speed of Prolog"
Keywords: prolog execution speed
Message-ID: <564@ecrcvax.UUCP>
Date: 19 Jul 88 08:57:25 GMT
References: <6251@megaron.arizona.edu>
Reply-To: micha@ecrcvax.UUCP (Micha Meier)
Organization: ECRC, Munich 81, West Germany
Lines: 16

In article <6251@megaron.arizona.edu> debray@arizona.edu (Saumya Debray) writes:
>Assuming that the comparison is a fair one (i.e. noone's
>writing execrable Pascal code or using the slowest Pascal system
>available), this seems to suggest that using a "state-of-the-art"
>Prolog system, one could actually have a Prolog version of the
>compiler that was faster than the Pascal version.

	Well, I must say that our experiences are different, at least
	concerning compilers for Prolog. I'm sure everybody agrees that
	Quintus Prolog is a very fast Prolog, but our compiler, written in C,
	is about 10 times faster than Quintus compiler written in Prolog
	(and it does more optimizations). An interesting thing is that
	most of the time is spent in the first pass, i.e. reading in
	the clauses; maybe this makes Prolog different from other languages.

--Micha