Hi Guys,
Depending on the website you are attempting to go to and the number of scripts etc your browser may slow down.
Ya mate. But for example I had to wait more time to access Wikipedia with avast! ON. However today I restored factory settings to default. Now it seems no problem with internet/browsing speed. BTW I didn’t touch any settings earlier. Don’t know what happened, it just happened.
Be grateful avast! is doing its job.
I Love avast! and I just wanted to report my problem for avast! guys to take a note of that mate 
Cheers…