Date:	Fri, 5 Aug 1994 09:38:10 +1000
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From: Mr WT Wong <wtwong>
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Subject: Re: why djgpp so slow on plain DOS
To: GCHEN AT mailgate DOT datap DOT ca (CHEN, GANPING)
Date: Fri, 5 Aug 1994 09:36:22 +1000 (EST)
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In-Reply-To: <85E6B938018C2979 AT -SMF-> from "CHEN, GANPING" at Aug 4, 94 08:23:48 am
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Hi Ganping,

> 
> 
>      When I run djgpp on plain DOS, it is so slow that it seems hang
> forever. For only one line program in C++, it took 2'30". But when I run 
> the djgpp on Windows DOS box for the same program, it seems ok (it took 
> 20"). I wonder what causes this problem.
> 
>      My machine is DX2/66 with 8M RAM. I use Smartdrive instead of RAM
> drive. Any comments are very much appreciated.

	I posted a similar question not too long ago, so it's likely that
	you're having the same problem that I had.
	Anyway, what I was doing wrong was using EMM386 with its default
	256 kb of expanded memory, so when go32 runs, it uses the expanded
	memory instead of extended memory. As a result of the small amount
	of memory (<256kb) it does a lot of swapping and slows down.
	When you're using a Windows dos box, Windows provides all the 
	DPMI memory that is available, which is about 2-2.5 MB looking at
	your configuration of 8 MB, also depends on what you've got running at
	the same moment.
	I just got rid of EMM386 and loaded everything low but I now have
	a lot more extended memory for go32 so gcc compiles faster. Hope 
	this helps.

-- 
John Wong                   |        Tel : 905 5535
Elec. & Comp. Systems Eng.  |      email : wtwong AT fawlty7 DOT eng DOT monash DOT edu DOT au
Monash University           | 
Clayton, Victoria           |      "Do it or do it not, there is no try"
Australia                   |             - Yoda, TESB            



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