Flywheel: Google’s Data Compression Proxy for the Mobile Web
Proceedings of the 12th USENIX Symposium on Networked
Systems Design and Implementation, NSDI 2015, USENIX, 2560 Ninth Street,
Suite 215, Berkeley, CA, 94710 USA
Victor Agababov, Michael Buettner, Victor Chudnovsky
Mobile devices are increasingly the dominant Internet access technology.
Nevertheless, high costs, data caps, and throttling are a source of widespread
frustration, and a significant barrier to adoption in emerging markets. This paper
presents Flywheel, an HTTP proxy service that extends the life of mobile data plans
by compressing responses in-flight between origin servers and client browsers.
Flywheel is integrated with the Chrome web browser and reduces the size of proxied
web pages by 50% for a median user. We report measurement results from millions of
users as well as experience gained during three years of operating and evolving the
production service at Google.