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From: "Hannu E K Nevalainen" <garbage_collector AT telia DOT com>
To: <cygwin AT cygwin DOT com>
Subject: RE: cygwin gcc performance
Date: Fri, 4 Jun 2004 20:10:56 +0200
Message-ID: <NGBBLLIAMFLGJEOAJCCEEEEADLAA.garbage_collector@telia.com>
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In-Reply-To: <Pine.GSO.4.58.0406041202040.2262@slinky.cs.nyu.edu>

> From: Igor Pechtchanski
> Sent: Friday, June 04, 2004 6:08 PM

> On Fri, 4 Jun 2004, Matthieu VIAL wrote:
>
> > Hello,
> >
> > Could someone explain me why gcc cygwin compiler take so long to build a
> > simple hello world program compared with mingw ?
>
> Cygwin is a POSIX emulation layer.  Using the POSIX emulation is bound to
> be less efficient than running the native application (which is what the
> MinGW gcc is).  If you want to know wher ethe time's going, look at the
> strace output (don't send it to the list, though, as your times look quite
> normal -- I get about 1.6s on my system once gcc is in the disk cache).

Well, then it might also depend a bit on HOW you launch mingw-gcc;
Matthieu had a strange way to do it.

$ time gcc -mno-cygwin -o hw hw.c; \
  time gcc             -o hw hw.c
real    0m2.133s
user    0m0.530s
sys     0m1.590s

real    0m1.932s
user    0m0.530s
sys     0m1.410s

This is in my P2/450... FWIW - just my 0.2 seconds.

/Hannu E K Nevalainen, B.Sc. EE - 59+16.37'N, 17+12.60'E             --76-->

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