>I picked the 32 bit version of the benchmarks, since the demo program didn't need multiple GB worth of memory, FWIW. More addressable memory is but one advant

>I picked the 32 bit version of the benchmarks, since the demo program didn't need multiple GB worth of memory, FWIW. More addressable memory is but one advantage of 64-bit versus 32-bit, the fact that it has double the amount of registers is another VERY important performance aspect since registers are by far the fastest place to store and retrieve data from, so less need to push values from registers on to stack / flushing cache lines, means faster running code, and in hot loops the difference in performance can be huge. >Otherwise, I thought I was pretty clear why I picked binary tree over, say, mandelbrot set. But why not show ALL the results and just highlight binary trees, there are a lot more benchmarks there than mandelbrot, also I don't see what is wrong with 'number crunching' benchmarks ?