ad server solution

i am looking for an open source ad server that serves advertising from my sales team and if there aren`t any to show from an advertising network set by me

i want to add different websites and the advertiser can select on which zone and site to publish the banners

i tried to use openx, but my first experience was 开发者_开发技巧that it is really slow:(

Thanks in advance

Cosmin,

I'm using OpenX and I managed to obtain more than several hundreds ads delivered per seconds. What do you mean is it slow, did you performed some benchmarks?