WWOF: An Energy Efficient Offloading Framework for Mobile Webpage

Currently, the smart-phone has become a significant part for many people. As the major role in providing excellent surfing experiences for users, web browser can not only serve web sites visiting, but also support mobile web applications in smart-phones. In the meantime, in order to attract users, mobile web applications provide more and more diverse choices, which, however, results in the increase of CPU usage, time and energy consumption. Hence, how to improve efficiency of these applications without affecting user experiences has became a significant project. One of the solutions is to migrate the heavy computing tasks of mobile web applications from browser to cloud, which is called Offloading. This paper presents the design and implementation of a generic framework to realize the offloading from local browsers to cloud--Web Worker Offloading Framework (WWOF). The designed framework is easy to apply and is fully compatible with HTML5 API. On client side, the native Web Worker API is replaced by a library to offload seamlessly. On cloud side, corresponding interfaces are implemented to run workers on the server. To prove the effect of WWOF, evaluation of several benchmarks has been made, which shows 85% energy saving and 2-4 times execution speed-up on average for some mobile web applications.