Date: Wed, 28 Dec 94 08:57:59 MEZ
From: A8411GAC AT AWIUNI11 DOT EDVZ DOT UNIVIE DOT AC DOT AT
Subject: Re: Compilation times
To: djgpp AT sun DOT soe DOT clarkson DOT edu

Hi, DJGPP'ers

On Fri, 23 Dec 94 08:28:24 -0500 you said:
>
>With a well-tuned system, compile times are pretty good.  I can
>compile gcc (no c++) with -O3 in about 15 minutes on my P90.
>

my experiences are, the compilation speed heavily depends on how you
'tuned' your system:
example: I'm currently using two PC's, on both is DJGPP installed with
the same setup.
-) machine #1: DOS 5.0, QEMM, 8 MB RAM, 33 MHz 486
-) machine #2: DOS 6.2, QEMM, 8 MB RAM, 33 MHz 386+387

On both machines smartdrive, both machines have a 1 MB RAMdrive.
The GCCTMP env. variable is set to the RAMDRIVE, so every intermediate
GCC file goes to drive E: (btw. F:)

The 386 harddisk, is defragmented, the 486 isn't.
On both machines, smartdrive is enabled with 1.5 MB cache, both HD have
approx. the same transfer and access rate.

-----> The 386/387 couple is approx. 1.4 times *FASTER* during compilation.

my conclusio: It REALLY depends on how the system setup is.
I had really good succes when I tried to speed up the compilation cycle
via defragmenting my disk, and making the smartdrive cache as big as to
keep 'gcc', 'cc1' and 'as' together in memory.

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  Matthias Burian                  Institut fuer Analytische Chemie
                                                  Universitaet Wien
  a8411gac AT helios DOT edvz DOT univie DOT ac DOT at            Waehringerstrasse 38
  a8411gac AT awiuni11 DOT edvz DOT univie DOT ac DOT at          1090 Wien    AUSTRIA
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