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Discussion Starter · #1 ·
Leave the MacBook/Pro out of this one. I'm assuming there are still lots of G4 Powerbooks and G5 Powermacs that will be in use when Leopard arrives. I am wondering, since all G5's are 64-bit hardware, does this mean that Leopard will run more efficiently (including OS 10.6) on a G5 than a 32-bit G4?
 

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Discussion Starter · #2 ·
Just read this about 64-bit apps: "some 64-bit programs will actually perform more slowly than 32-bit equivalents, particularly on G5 Macs. Although most applications are likely to pick up some performance by going 64-bit, the benefits are not likely to be overwhelming, even on the new Mac Pro and future models with Core 2 processors. The main problem is that going from 32- to 64-bits results in inflated code, which means less of it fits in the processor's L1 and L2 caches, and more relatively slow calls to memory are required."
 
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