Benchmark & Tuning - This app is a must have if you want to run a quick but precise benchmark on your Android phone, without wasting your battery's energy. The tested components will be your cpu, memory and input/output capabilities.
This app fully supports multi-core devices and gives you the possibility to choose between single-threaded or multi-threaded tests
TAP Benchmark - This app is aiming to give you better numbers for comparing different filesystems used in various lagfixes. It should also work for different phones, so that you can compare performance between them