It is a simple memory bandwidth benchmark application for Android. Simply install, press "Run" and it will give you a score for achievable memory bandwidth.

Alternately, you can try out various settings such as number of threads. You can also run the "Misc" tests which are a variation of the STREAM benchmarks. The "Simple" simply tests the memcpy performance.

edit: Some scores. 1.25 GB/s on Samsung Hummingbird processor. 1.8GB/s on the previous-gen dual-core Snapdragon.