CocoaSPDY - SPDY for iOS and OS X
SPDY was originally designed at Google as an experimental successor to HTTP. It's a binary protocol (rather than human-readable, like HTTP), but is fully compatible with HTTP. In fact, current draft work on HTTP/2.0 is largely based on the SPDY protocol and its real-world success.The first, and arguably most important, is request multiplexing. Rather than sending one request at a time over one TCP connection, SPDY can issue many requests simultaneously over a single TCP session and handle responses in any order, as soon as they're available.