Hi Franco, one of my other ideas was a semi-transparent map where the transparent flag is set but the 0x4b polygon is still added to the map. Made no difference. Gerd ________________________________________ Von: mkgmap-dev <mkgmap-dev-bounces@lists.mkgmap.org.uk> im Auftrag von Franco Bez <franco.bez@web.de> Gesendet: Samstag, 6. Juni 2020 10:39 An: mkgmap-dev@lists.mkgmap.org.uk Betreff: Re: [mkgmap-dev] Performance of POI search on the Device Hi Gerd, I tried out my old Oregon 550 and my ZUMO 396 The Oregon 550 behaves almost identical to the Oregon 750t. The boundary layer slows down the POI search by factor 10. Round about 1 sec without and 9 sec with the boundary layer. If I put all transparent layers on the SD Card it's 50 sec. I assume the biggest impact comes fron my contourlines layer with DEM Data for all of Europe (3,7GB size). The Zumo seems to be faster. The boundary layer is no big problem (maybe 1 sec penalty). But when I put my contourlines layer on the Zumo it slows down extremely. The GARMIN Firmware bug seems to affect several devices, if not all. Ciao, Franco _______________________________________________ mkgmap-dev mailing list mkgmap-dev@lists.mkgmap.org.uk http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev