Multi-Domains super slow

I had to remove multi-domains plugin from my site as it brought my site to a stand still.

when on my blogs/create page, it shows in my browser that all my sub blogs are being 'scanned' or something...

Same thing when I go to my sites homepage, it hangs forever while 'scanning' through or loading all the sub blogs.

Is this something to do with the plugin or my actual setup?

Running Buddypress and Wordpress Multi site latest..