As of 2015, computer processor reviews can be read at Tom's Hardware and TechRadar. Both websites focus primarily on desktop computer processors with a slant toward video game performance.
Tom's Hardware specializes in hardware reviews and therefore reviews computer processors more often. The site has a periodic feature that takes a specific video game or piece of software and shows how well different processors performed on it. For video games, it shows, at specific settings, how many frames per second the game outputs. The higher frames per second, the better the processor performs.
Both companies compare different processors by having all other hardware equal, in order to eliminate all factors but the processor in final performance.