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000023_icon-group-sender _Wed Jul 21 09:14:42 1993.msg
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Received: by cheltenham.cs.arizona.edu; Wed, 21 Jul 1993 10:50:32 MST
Message-Id: <9307211612.AA52197@enlil.premenos.sf.ca.us>
From: Ken Walker <kwalker@shara.premenos.sf.ca.us>
Subject: compiler performance
To: icon-group@cs.arizona.edu
Date: Wed, 21 Jul 93 9:14:42 PDT
Mailer: Elm [revision: 66.25]
Status: R
Errors-To: icon-group-errors@cs.arizona.edu
> Richard L. Goerwitz writes:
>
> ... The first is to use the compiler. ... and the speed increase
> can be anywhere from two to a hundredfold.
***********
?
Wow, the most I every got was a factor of around 30 for
procedure main()
every i := 1 to 1000000
end
which I had reasons to expect would be optimized about as much
as anything.
Richard may have more practical experience with the compiler than
I have (even though I wrote it :-), but I think a factor of two to
four is more typical. Of course, a speed increase of a factor
of four or so can certain make the difference with some programs
between being usable and not. And your favorite program might
be one of those that gets optimized even more.
(For the record, I like Richards claim better than mine :-)
Ken Walker, kwalker@premenos.sf.ca.us