Re: [gdal-dev] RasterIO slower on Windows

2009-12-11 Thread Adam Kubach
Even, Yes, this is on the same machine. The driver is GeoTIFF (I haven't tried other ones) with external overviews. Adam On Fri, Dec 11, 2009 at 12:41 PM, Even Rouault wrote: > Adam, > > I assume that you're testing on the same machine. Such difference is not > expected. Do you see that slowdo

Re: [gdal-dev] RasterIO slower on Windows

2009-12-11 Thread Even Rouault
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 ex

[gdal-dev] RasterIO slower on Windows

2009-12-10 Thread Adam Kubach
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