increase performance iis7

Hi,

I am working on financial terminal with SignalR. Our platform send us about 6 000 000 updates per minutes and iis 7 send to all clients only 500 000 per minutes !!!!!

What have to do to inscrease that ? IIS is too limited ?

Thanks in advance for your advices.

Regards

PS: I did this requested: https://github.com/SignalR/SignalR/wiki/Performance