Also have the Mid 2012 Retina MBP at 2.3GHz. Rendering at ~60fps in Chrome 42.0.2307.0 canary (64-bit). Interestingly, when switching to Safari 8, performance

Also have the Mid 2012 Retina MBP at 2.3GHz. Rendering at ~60fps in Chrome 42.0.2307.0 canary (64-bit). Interestingly, when switching to Safari 8, performance drops to ~36fps as well.