Tried to search on this but didn't find anything..

The browser started to acting really slowly on my n900. When ever i loaded a new site up, once loaded its like the browser froze for several seconds before i was able to fill out forms, zoom with double tap or click on a link. I've lived with this for a few days now...

So i tried to clear private data except for passwords and now it works smoothly again.. Any one know what happened? too much cache or something? i use the browser alot so i imagine i fill it up really quickly..