Safari 5.0 becomes slow, too slow

I have performed few steps, and now it seems my Safari is again on good track:

1. 1. Turn off Fraudulent sites: Safari -> Preferences -> Fraudulent sites -> uncheck
2. 2. Clear history: History -> Clear History
3. 3. Reset Safari: Safari -> Reset Safari
4. 4. Disable AutoFill: Safari -> Preferences -> AutoFill -> uncheck all
5. 5. Installed most recent Adobe Flash Player: http://www.adobe.com/products/flashplayer/ – in my case it is 10.1

It looks like performance is better now.