Hah, I'm still using an old version of Opera, but the #1 speedup is simply using it's built-in (and easy to tweak) site-preferences so that only certain sites are whitelisted for Javascript.
Some sites are just ridiculously faster and more-responsive, especially general news sites where all I really want is some text I can immediately read and scroll through.
Some sites are just ridiculously faster and more-responsive, especially general news sites where all I really want is some text I can immediately read and scroll through.