How to choose a tool for mapping?

[Mark Oliva]

The thing about 64 bit is that a lot of software are not optimized to work on multiple cores. <SNIP> So in some cases, the difference in performance between a 32 and 64 bit version is small.

I agree, of course, when it comes to processor performance. However, the difference in performance between 4 GB RAM (all that's available to 32-bit applications) and 64 GB RAM (available to 64-bit applications) can be tremendous, to say the least.