I've noticed some large performance differences between debug and release
builds using VC 8.0 when stl containers are used (not specifically with
geos, but in general). I believe iterator debugging is enabled by default
in debug builds. See
http://msdn2.microsoft.com/en-us/library/Aa985939(VS.80).aspx for more info.
You might try turning this off and see what effect it has.
Pete
----- Original Message -----
From: "Fabian Hohmuth" <[EMAIL PROTECTED]>
To: "GEOS Development List" <geos-devel@geos.refractions.net>
Sent: Thursday, October 11, 2007 2:41 PM
Subject: [geos-devel] speed difference between release and debug builds
Hi all,
we're using GEOS via the C API under Windows (doing unions on a number of
complex polygons) and noticed that there is a major (3x) speed difference
between the Release and Debug builds. I somehow can't believe that the
compiler optimization is that good. The defined preprocessor symbols are
the same between the two configurations. Any hints where this could come
from?
Thanks,
- Fabian
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