These days there are basically two different groups of customers who demand lots of processing power: content creators and gamers, while this 2D performance comparison is targeting content creators. After having had a look at the following pages you'll have an overview on how fast recent CPUs are in regarding a variety of programs, may it be video encoding, rendering, ...
Slow computer got you down? Maybe a hardware upgrade should be in your cards, if so this guide to the Fundamentals of Upgrading a PC is an invaluable read. PCSTATS Tips