Path: utzoo!mnetor!uunet!lll-winken!lll-lcc!mordor!sri-spam!rutgers!rochester!srs!matt
From: matt@srs.UUCP (Matt Goheen)
Newsgroups: comp.arch
Subject: Re: Approaches to computer system performance
Message-ID: <580@srs.UUCP>
Date: 1 Feb 88 14:18:39 GMT
References: <839@ima.ISC.COM> <2158@geac.UUCP> <604@bnr-rsc.UUCP> <180@granite.dec.com> <3081@watcgl.waterloo.edu> <578@srs.UUCP>
Reply-To: matt@srs.UUCP (Matt Goheen)
Organization: S.R. Systems, Rochester NY
Lines: 23
Keywords: Algorithms, assembler
Summary: Assembly CAN help...

In article <578@srs.UUCP> dan@rem.UUCP (Dan Kegel) writes (pretty much):
>In article <3081@watcgl.waterloo.edu> tbray@watsol.waterloo.edu writes (sorta):
>> Given a routine which is sucking up a lot of your resources, how much 
>> can you gain by hand-coding in assembler?
>>
>>Algorithms si!  Low-level hacking no!
>>Tim Bray, New OED Project, University of Waterloo
>
>Yes... but lots of people are that lucky, and sometimes the payoff is great.  
>I recently rewrote a self-recursive procedure to pass all parameters in 
>registers, yielding a 2x speedup.
>-- 
>   Dan Kegel

Must agree with Dan here.  A few months ago I was writing an approximate
integer square root routine.  I found that the assembly version was more
than 3 times faster than the cafefully coded C routine...


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- UUCP:	{allegra,rutgers,ames}!rochester!srs!matt	Matt Goheen 	-
- 	"First the pants, THEN the shoes."		S.R. Systems	-
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