Adam,
I assume that you're testing on the same machine. Such difference is not
expected. Do you see that slowdown with different GDAL drivers or just
for one in particular (which one?)
Windows builds are able to use overviews. But are you speaking about
internal GeoTIFF overviews or about external overviews (.ovr files) ?
Even
Adam Kubach a écrit :
Hi,
It appears that my calls to RasterIO are about 10 times slower on
Windows than Linux when reading from the same dataset. I wouldn't
think that there would be a noticeable difference. Has anyone else
seen this? Is it possible that the overviews aren't being used on
Windows? Is there anyway I can verify that they are being used (Other
than a debugger)?
Thanks,
Adam
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