When visiting popular websites, we often experience high
CPU utilization caused by Flash advertisement contents with
colorful graphic effects. For instance, as shown in Fig. 1,
the ESPN website shows 30% of CPU utilization, whereas
Amazon requires 1% of CPU utilization for the initial loading
time. Thus, web browsers staying on ESPN will consume
more energy than Amazon, because power usage is generally
in proportion to CPU utilization. Popular websites, accessed