SPDY does and focuses on the following: compresses the stream using gzip, encrypts the transmission, supports unlimited connections (unlike HTTP’s max of 6 in certain browsers), and allows for the server to communicate with client without a client request, which is perfect for our Web 2.0 AJAX-populated world.
As this may sound like Greek to many of us, here’s the bottom line: potentially 44 to 64% improvement in page load times!
Currently, only the Google Chrome browser supports SPDY and only Google websites use this technology, but stay tuned for other sites to start using this as SPDY is open-source.