I've got an Early-2009 Unibody Mac Book Pro 17".
It came with 4 GB RAM and by default it boots into 32-bit Kernel.
I've just upgraded to 8 GB RAM and my main concern is getting maximum performance from my 64-bit version of Lightroom 3 (I scan negatives and edit large tiff files).
Now that I've got 8 GB RAM, will booting into 64-bit Kernel give me any performance boost on Lightroom (and even generally)?
Should I see a performance boost on 32-bit Kernel with the additional RAM?