Photoshop CS5 64-bit benchmarks ( vs. CS4) by John Nack on Adobe

John Nack on Adobe: Running Photoshop in 64-bit mode produces some big improvements when using large data sets (scenarios where you'd otherwise run out of RAM and have to hit virtual memory). Here are benchmarks from a 2 x 2.66GHz quad-core Nehalem Mac Pro with 12GB of RAM (OS X 10.6.3):

Running the Retouch Artists Speed Test:

CS4: 36.09 secs

CS5 64bit: 14.78 secs

2.4 times faster*

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