Apple Benchmarks Safari 5.1.4 on OS X Lion – Softpedia
... 5.1.4 for OS X Lion improves JavaScript performance up to 11% over Safari 5.1.3. Apple's benchmark was conducted in January 2012 on a 2.7 GHz Quad-Core Intel Core i5-based iMac 21.5-inch system using OS X Lion v10.7.3 (the current version of the OS).
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