performance - WPF poor perfomance of loading images on WindowsXP -


i have code load image thumbs , display them in listbox. works on win7. on windows xp takes seven-ten minutes load few big images, while on 7 takes seconds. how can speed up?

    public static string addimage(string file)     {         string key = "img_" + (++_counter).tostring("00000");         imageinfo inf = new imageinfo();         inf.originalpath = file;         inf.id = key;         inf.originalpath = file;          bitmapimage bi = new bitmapimage();         bi.begininit();         bi.decodepixelwidth = thumb_size;         bi.cacheoption = bitmapcacheoption.onload;         bi.urisource = new uri(file);         bi.endinit();         inf.thumbbitmap = bi;          _storedimageinfo.add(key, inf);          return key;     }

imageinfo own class containing references bitmapimages , images' path. not think has major influence on loading times.


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