Google Research

The QUIC Transport Protocol: Design and Internet-Scale Deployment

  • Adam Langley
  • Al Riddoch
  • Alyssa Wilk
  • Antonio Vicente
  • Charles 'Buck' Krasic
  • Cherie Shi
  • Dan Zhang
  • Fan Yang
  • Feodor Kouranov
  • Ian Swett
  • Janardhan Iyengar
  • Jeff Bailey
  • Jeremy Christopher Dorfman
  • Jim Roskind
  • Joanna Kulik
  • Patrik Göran Westin
  • Raman Tenneti
  • Robbie Shade
  • Ryan Hamilton
  • Victor Vasiliev
  • Wan-Teh Chang
SIGCOMM 2017 (2017)


We present our experience with QUIC, an encrypted, multiplexed, and low-latency transport protocol designed from the ground up to improve transport performance for HTTPS traffic and to enable rapid deployment and continued evolution of transport mechanisms. QUIC has been globally deployed at Google on thousands of servers and is used to serve traffic to a range of clients including a widely-used web browser (Chrome) and a popular mobile video streaming app (YouTube). We estimate that 7% of Internet traffic is now QUIC. We describe our motivations for developing a new transport, the principles that guided our design, the Internet-scale process that we used to perform iterative experiments on QUIC, performance improvements seen by our various services, and our experience deploying QUIC globally. We also share lessons about transport design and the Internet ecosystem that we learned from our deployment.

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