Netflix saw a 43% decrease in their bandwidth bill after turning on GZip. Permalink Share on Twitter

While reducing page load from 15 seconds to 2 seconds, Intuit saw a 3% improvement in conversions for every second reduced over 7 seconds, and a 2% improvement in conversions for every second reduced over 5 seconds. Permalink Share on Twitter

A presentation from AOL revealed that visitors in the top 10% of site speed viewed 50% more pages than visitors in the bottom 10%. Permalink Share on Twitter

Google reported that users who experienced a 400ms delay performed 0.44% fewer searches during the first three weeks and 0.76% fewer searches during the second three weeks. Permalink Share on Twitter

Removing one client-side redirect from Google's DoubleClick resulted in a 12% improvement in click-through rate. Permalink Share on Twitter

Yahoo increased traffic by 9% for each 400ms of improvement in load time. Permalink Share on Twitter

Shopzilla decreased load time by 5 seconds and saw a 12% increase in conversion rate, a 25% increase in page views and a 50% reduction in infrastructure required. Permalink Share on Twitter

Mozilla cut load time by 2.2 seconds and saw download conversions increase by 15.4% Permalink Share on Twitter

Google finds a 500ms increase in page load results in 25% less searches. Permalink Share on Twitter

Etsy saw a 12% increase in bounce rate when they added 160KB of images to their mobile page. Permalink Share on Twitter