tap tap tap points out something that perhaps should have been obvious from the start regarding the iPhone 3GS' 256MB of RAM -- that doubling the memory, once the OS loads and programs start eating away at it, often leaves more than double the free space.
The older iPhone models have been often considered underpowered when it comes to RAM, so even though the RAM amount is technically doubled, in actual use, you’ll often be working with 4x to 10x the amount of free RAM. And that’s one major aspect that’s contributing to the overall speedier feel of the 3GS.
As we saw in our video iPhone 3GS vs. iPhone 3G app launch smackdown, this translates directly into keeping Mobile Safari pages loaded, for example, when you exit out, load a large app, and then come back.
