Date: Mon, 9 Jun 1997 14:19:48 +0200 (MDT)
Message-Id: <3.0.16.19970609194139.3567dcf6@hem1.passagen.se>
To: Jan Hubicka <hubicka AT ta DOT jcu DOT cz>
From: Peter Palotas <blizzar AT hem1 DOT passagen DOT se>
Subject: Re: Speed of DJGPP?
Cc: djgpp AT delorie DOT com
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At 13.28 1997-06-09 +0200, you wrote:
> On Thu, 5 Jun 1997, Peter Palotas wrote:
>> Okay, then I misinterpreted what the guy wrote. This makes more sense.
>> Although, I presume DJGPP makes faster code than BC!? Although, it produces
>> about the same code as Watcom from what I have understood, so the question

>not exactly same. In more complex tests(like floating point mandelbot loop)
>is gcc still twice faster then wc.

Well, that is not completely true. I wrote a madelbrot program for my math
class just about two weeks ago, and a friend of mine had a friend of his
write another mandelbrot program for him, I wrote mine in DJGPP (ofcourse)
and he wrote his in Watcom. There was a small diffrence in speed, his was a
little bit faster on a Pentium, and we used the exact same algorithm in the
main loops. But as far as I know, DJGPP does not optimize code for Pentiums
which Watcom does so that might explain it. But then I wonder how did they
do it with quake? I mean Quake must have Pentium optimizations, did they
write thos in inline ASM or something or what?

>> is, why does it have to be slower?

>I personally think that it is sloweb because compiler is more unix oriented-
>has more separated phases. As far as I know watcomm has just one program 
>that does whole compilation and outputs in object..gcc has separaed 
>assembler,compiler etc...so it forces some temporary files.
>I am also not sure if watcomm uses something like RTL

What's RTL?
Well, yeah, DJGPP uses more temp-files, I'm just wondering why not try and
solve that problem by integrating the diffrent compilers, preprocessors and
assemblers a  bit more, so that they don't have to use temporary files. 



------- Peter Palotas alias Blizzar -- blizzar AT hem1 DOT passagen DOT se ---------

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* A brief description of DJGPP:                                     *
* Never before has so few people done so much for so many... DJGPP! *
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