27.11.2015, 14:10, Even Rouault kirjoitti: > Try setting GDAL_CACHEMAX to 150 (6048 * 4032 * 3 = 73 MB. and a x 2 > security margin) This reduces the time into 4 s. Quite a bit reduction from several hours. Maybe the default is too low? 150 MB does not seem much. Ari