GPU performance also remained mostly unchanged as you can see by the Portal 2 numbers, although the Cinebench 11.5 OpenGL test did go up a bit. There were a couple of tests that showed more than a 10% increase in performance (possibly a reflection of Lion's upgrade to OpenGL 3.2 from 10.6's not-quite-3.0) but generally Lion performs no differently than Snow Leopard regardless of the nature of the benchmark. As you can see for the most part performance really remains unchanged: The graph below shows the 2011 MacBook Pro and how its performance fares under both OS X 10.6.8 and 10.7.0. We measured performance across a number of applications as well as battery life. A brand new Core i7 15-inch MacBook Pro and a much older Penryn Core 2 Duo 15-inch MacBook Pro. Earlier beta releases of the OS were significantly slower than Snow Leopard, but the final code appears to perform on par with SL regardless of microprocessor architecture. Generally speaking, performance under Lion hasn't changed all that much since Snow Leopard. The majority of our OS X benchmarks involve patience and a stop watch and we've redone the whole suite in anticipation of Lion. Benchmarking Macs is a lot like benchmarking smartphones: there's a huge user experience component and not enough tools to really do a thorough job of evaluating performance.
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