Simple, quick update: Chrome 18 brings improved graphics performance. To do this, it’s enabled GPU acceleration for Canvas 2D (a graphical element of HTML5) for the first time in a non-beta release, meaning that it should improve gaming and web app performance dramatically, while reducing the strain on your computer’s CPU. There’s also aother WebGL graphics standard — the TransGaming’s SwiftShader rasterizer, a software-based solution that allows for older computers to access basic 3D web content. It’s disabled on newer machines, but it’s nice for Chrome to have such large support. This update should come automatically to your version of Chrome, but if it doesn’t, head into the settings and check for the update, manually.
Via: The Chromium Blog