Path: utzoo!utgpu!jarvis.csri.toronto.edu!cs.utexas.edu!yale!mfci!wilson
From: wilson@mfci.UUCP (Jeff Wilson)
Newsgroups: comp.sys.atari.8bit
Subject: Re: Why does my program take so long?
Message-ID: <1254@m3.mfci.UUCP>
Date: 7 Mar 90 03:56:08 GMT
References: <1894@clyde.concordia.ca>
Sender: news@mfci.UUCP
Reply-To: wilson@mfci.UUCP (Jeff Wilson)
Distribution: na
Organization: Multiflow Computer Inc., Branford Ct. 06405
Lines: 14

In article <1894@clyde.concordia.ca> dcfs018@antares.Concordia.CA writes:
>Hello all.  I've written a little machine language program that reads the
>trigger port and stores the results in RAM until there's no more memory.
>
>I optimized the thing so that it ran as fast as possible.  That meant counting
>cycles to find the fastest instructions to do the job.
[...]
>Therefore the question is, why is my 130XE slow by 10%?

Did you account for the lossage in 6502 performance as references
cross page (256 byte) boundaries?  But that still doesn't explain
10%.

Jeff