Mac Pro Westmere Photoshop Performance: diglloydHuge
The diglloydHuge benchmark measures core Photoshop operations, generating a huge 56GB scratch size. Even a Mac Pro with 64GB of memory will show some speed impairment.
With a hard drive, the differences shown here would be much greater; all the machines here used dual 200GB Mercury Extreme Pro RE SSDs in a 400GB RAID-0 stripe for scratch, which is as fast a scratch drive as Photoshop can utilize.
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CPU core usage
See Monitoring system performance with Activity Monitor. Black areas are idle, red and green are usage.
Very poor use of CPU cores, with about 80% or more of the computing power squandered.
This graph shows 1 iteration on the 8-core 2.93GHz Mac Pro Nehalem with 64GB memory.