For over a year now, Twitter has supported the SPDY protocol and today it accounts for a significant percentage of our web traffic. SPDY aims to improve upon a number of HTTP’s shortcomings and one client segment in particular that has a lot of potential to benefit is mobile devices. Cellular networks still suffer from high latency, so reducing client-server roundtrips can have a pronounced impact
![CocoaSPDY: SPDY for iOS / OS X](https://cdn-ak-scissors.b.st-hatena.com/image/square/a7dfbba80c1b2e3d08e53178d335285f8dc68548/height=288;version=1;width=512/https%3A%2F%2Fcdn.cms-twdigitalassets.com%2Fcontent%2Fdam%2Fblog-twitter%2Fengineering%2Fen_us%2Fmain-template-assets%2FEng_EXPLORE_Pink.png.twimg.768.png)