Slow champion Selection load(client)

My computer use to load the champion select in quick, which was helpful as i could call my lane in blind fast or show my pick internet before people had a chance to possible ban my champion. However, I have noticed with each patch, it has loaded in slower and slower. Well now its so slow that I hardly ever get the desired lane in blind, and I will load in just in time to see who everyone has banned. If I am quick, I can ban a champ. As well, in ranked champ select, everything is laggy. For example, I have two rune pages, and occasionally I will end up autofilling for support. Normally I would just quickly edit a rune page and give it the correct runes for the support. But between the slow loading and the lag in that, I just simply dont have time to.

I feel like its because there is cached data thats being stored, and that i just need to empty out that data to speed it up again. But its an idea. I dont know for sure. Please help though.