John Nack on Adobe
As you've probably seen, among the great features in the Lightroom 2.0 beta
is its ability to run 64-bit-native on Mac (Intel, 10.5.x) and Windows (Vista 64). If you think it feels great to beat Aperture to the punch here, you're right. :-) What does 64-bit computing mean, practically speaking? In a nutshell, it lets an application address very large amounts of memory--specifically, more than 4 gigabytes. This is great for pro photographers with large collections of high-res images: Lightroom being able to address more RAM means less time swapping images into and out of memory during image processing-intensive operations. It's also important to say what 64-bit doesn't
mean. It doesn't make applications somehow run twice as fast. As Photoshop architect Scott Byer writes, "64-bit applications don't magically get faster access to memory
, or any of the other key things that would help most applications perform better." In our testing, when an app isn't using a large data set (one that would otherwise require memory swapping), the speedup due to running in 64-bit mode is around 8-12%. read more...