My problem with SPDY is that it is compressing only headers.
I still haven't figured out how to combine SPDY and gzip compression for POST requests without manually decompressing it in the browser javascript.
Other than that SPDY is extremely useful for web apps as the latency with HTTP round-trip is noticeable and most of the cases web app already runs behind TLS.
For a regular website (not a web app) SPDY adds much less value: 1) TLS encoding and negotiation adds load time 2) 3rd party javascript loading from HTTPS sources do the same 3) Main server data that was previously sent gzipped is now sent deflated [1].
[1] Maybe it's just my incompetence and it's easy to compress the SPDY content. Would be happy to hear about it.
I still haven't figured out how to combine SPDY and gzip compression for POST requests without manually decompressing it in the browser javascript.
Other than that SPDY is extremely useful for web apps as the latency with HTTP round-trip is noticeable and most of the cases web app already runs behind TLS.
For a regular website (not a web app) SPDY adds much less value: 1) TLS encoding and negotiation adds load time 2) 3rd party javascript loading from HTTPS sources do the same 3) Main server data that was previously sent gzipped is now sent deflated [1].
[1] Maybe it's just my incompetence and it's easy to compress the SPDY content. Would be happy to hear about it.