A very simple bench mark could be something like: Code: echo "2^2^20" | time bc (you'll need to install 'bc' from the repos). It makes the CPU calculate a big sum. It will give you a few timing values at the end - these can be used to compare before and after results. FYI, my N900 gives: Code: real 0m 20.64s user 0m 19.05s sys 0m 0.05s
echo "2^2^20" | time bc
real 0m 20.64s user 0m 19.05s sys 0m 0.05s