Am 26.11.2010, 10:14 Uhr, schrieb Peter Körner osm-lists@mazdermind.de:
Yes I also had the feeling that the bw styles need very long to render but I don't have any idea why.
bw-mapnik is (bugfree assumed) 100% identical to the mapnik map except for the colour attributes, so I would expect the identcal time to render.
bw-noicons just omits some symbols, so - for low zoom tiles without symbols - is also identical to mapnik.
Kay