Date: Mon, 16 Dec 1996 18:53:49 +0200 (IST)
From: Eli Zaretskii <eliz AT is DOT elta DOT co DOT il>
To: "John M. Aldrich" <fighteer AT cs DOT com>
cc: Jurgen Schwietering <tweety AT Torino DOT ALPcom DOT it>, djgpp AT delorie DOT com
Subject: Re: gcc compiles so slow?
In-Reply-To: <32B22D13.5E7D@cs.com>
Message-ID: <Pine.SUN.3.91.961216184642.18715d-100000@is>
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII


On Fri, 13 Dec 1996, John M. Aldrich wrote:

> > trapped on djgpp. After installing i did compile the samples. Hello at
> > first. It took about 8 seconds to compile and link, the same programme
> > takes about 0.5 secs under BC3.1. Am I doing something wrong, or is this
> > normal?  Equipment: Pentium 100/8MB, DOS 6.22, SCSI2, Smartdrive, no other
> > TSR.

This is too slow for a Pentium.  Jurgen, I'd estimate you should go down
to about 4 seconds on a well-tuned system.  Be sure to read sections 3.9,
7.1 and 7.2 of the DJGPP FAQ list (available as v2/faq202b.zip from the 
same place you get DJGPP) and set your system using the advice there.

> > Can I use precompiled headers?

No.  GCC doesn't support this.

> > Can I use another compiler which is GO32 compatible?

There is no other compiler like that.

> HOWEVER, once you get past the initial cost of loading the tools, DJGPP
> is faster than any other 32-bit compiler with the same code.  Try
> comparing the compilation speeds of a fifty-thousand line project
> between the two compilers, and you'll see the difference.

DJGPP compiles at about half the speed of BC on the same machine, 
unless the source file is *real* small.  If you don't get this 
performance, your system needs tuning.