<a href="http://www.guypo.com/technical/not-as-spdy-as-you-thought/" rel="nofollow">http://www.guypo.com/technical/not-as-spdy-as-you-thought/</a><p><i>The results show SPDY, on average, is only about 4.5% faster than plain HTTPS, and is in fact about 3.4% slower than unencrypted HTTP. This means SPDY doesn’t make a material difference for page load times, and more specifically does not offset the price of switching to SSL.</i>