Hello,
can one part of the performance problem be, that default style is
rendering e.g. buildings in z=12?
Ok, I can see extrem large buildings like the terminal from airport
Berlin-Tempelhof in this zoom-level but the most buildings have subpixel
dimensions. So perhaps somebody is interested in style optimisation.
Especially with a view to what Wikipedia really needs, so IMO we could
live without "amenity=recycling"...
Greetings Kolossos