In December Nginx announced that it would upgrade their SPDY implementation to SPDY/3.1 which was funded by Automattic, MaxCDN, and CloudFlare. And now they implemented it with this commit on January 31st. SPDY/3.1’s highlights were that SPDY/3 implements flow control and SPDY/3.1 implements session flow control. And if any of you noticed I patched Nginx 1.5.9 to support SPDY/3.1 which should speed up some things.