id,summary,reporter,owner,description,type,status,priority,milestone,component,version,severity,resolution,keywords,cc 7012,OpenJPEG Driver inefficient on images with small tiles,trastourf,warmerdam,"The OpenJPEG driver is very slow with Sentinel Quicklooks like : http://sentinel-s2-l1c.s3-website.eu-central-1.amazonaws.com/tiles/31/T/EN/2017/5/26/0/preview.jp2 It seems the problem is related to the blocksize of the images (8x8) - internal tiles are processed one at a time which in this case leads to a very poor performance; gdal_translate image.jp2 image.tif takes about 7 seconds to execute (image size is 343x343). ",enhancement,closed,normal,2.2.2,GDAL_Raster,svn-trunk,normal,fixed,OpenJPEG,