Amila Welihinda on Twitter: "At amazon, every 100ms of latency costed us 1% in sales My team's goal was to cut https://t.co/GWQmrk4aI3's load time in half Here's what we did 🧵"

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At amazon, every 100ms of latency costed us 1% in sales My team's goal was to cut http:// amazon.com   's load time in half Here's what we did

Load all content above the fold first We saw a 500ms win when migrating features and content to load ATF, increasing sales by 5%.

Server side render everything http:// amazon.com   is server side rendered and has no client side rendering framework. The potential latency hit didn't justify it. We were stuck with jQuery 1.6.4 SSR React wasn't fast enough for us. This blew my mind.

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