To:	wtwong%fawlty8 DOT eng DOT monash DOT edu DOT au AT mailgate DOT datap DOT ca
Cc:	djgpp%sun DOT soe DOT clarkson DOT edu AT mailgate DOT datap DOT ca
Subject:	Re: why djgpp so slow on plain
From:	GCHEN AT mailgate DOT datap DOT ca(CHEN, GANPING)
Date:	05 Aug 94 08:59:39 MDT
References:	<30F4B938028C2979 AT -SMF->

>> 
>>      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.

After I posted the original message on the group, I have received about
10 replies. It was indeed a memory problem, but it was caused by EMM386
not SMARTDRV as pointed out by Mr WT Wong. Thanks all of you for the
help. *I love this group.*

... Ganping Chen

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   Ganping Chen, Ph.D             ||    Email: gchen AT mailgate DOT datap DOT ca
   System Engineer/Analyst        ||           gchen AT acs DOT ucalgary DOT ca
   Sandwell Inc.                  ||           chenga AT enel DOT ucalgary DOT ca
   Datap Systems Division         ||    Tel:   (403) 264-7005 ext. 169
   940 6th Avenue S.W.            ||           (403) 237-9500
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