HTTP/3 over UDP (to address the HoL blocking) Adds security, per object error and congestion-control
HTTP/Range_requests [2] https://www.smashingmagazine.com/2021/08/http3-performance-improvements-part2/#congestion-control render-blocking-resources/ [18] https://www.smashingmagazine.com/2021/08/http3-performance-improvements-part2/#congestion-control
最后,QUIC也使用所谓的流量控制(flow-control)[4]和拥塞控制(congestion-control)[5]机制来阻止发送方使网络或者接收方超载,但这也使得TCP比UDP更慢。