Hi Gerd, I test maps at my current location, which is near the center of Gdańsk, so it is rather dense map here. This 50% difference was in redraw time from nuvi menu "Dispaly Map" to fully rendered map. It was about 4 seconds for mkgmap and faster cgpsmapper and about 6 seconds for slower version of cgpsmapper compilation. Some more statistics: 29483017.img level 4: resolution 17, subdivisions 1 level 3: resolution 18, subdivisions 7 level 2: resolution 20, subdivisions 24 level 1: resolution 22, subdivisions 173 level 0: resolution 24, subdivisions 423 29483018.img level 4: resolution 17, subdivisions 1 level 3: resolution 18, subdivisions 7 level 2: resolution 20, subdivisions 36 level 1: resolution 22, subdivisions 429 level 0: resolution 24, subdivisions 3979 29483019.img level 4: resolution 17, subdivisions 1 level 3: resolution 18, subdivisions 4 level 2: resolution 20, subdivisions 35 level 1: resolution 22, subdivisions 221 level 0: resolution 24, subdivisions 367 -- Best regards, Andrzej