[Maps-l] Concerning cassini.toolserver.org

[Platonides]

Dane Springmeyer wrote:
>> Part of the problem may be that renderd uses a new instance
>> > per style per rendering thread.
> Yes, this certainly uses more memory, but it is an intended feature  
> AFAIK.
> 
> The mapnik.Map object is not (by design) intended to shared between  
> threads.

If renderd is able to only read the map after initialization (ie. work
with a const mapnik::Map&) there should be little problem with sharing
between threads.