ReACKed QUICer: Measuring the Performance of Instant Acknowledgments in QUIC Handshakes
arXiv:2410.20602 · doi:10.1145/3646547.3689022
Abstract
In this paper, we present a detailed performance analysis of QUIC instant ACK, a standard-compliant approach to reduce waiting times during the QUIC connection setup in common CDN deployments. To understand the root causes of the performance properties, we combine numerical analysis and the emulation of eight QUIC implementations using the QUIC Interop Runner. Our experiments comprehensively cover packet loss and non-loss scenarios, different round trip times, and TLS certificate sizes. To clarify instant ACK deployments in the wild, we conduct active measurements of 1M popular domain names. For almost all domain names under control of Cloudflare, Cloudflare uses instant ACK, which in fact improves performance. We also find, however, that instant ACK may lead to unnecessary retransmissions or longer waiting times under some network conditions, raising awareness of drawbacks of instant ACK in the future.
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References in corpus (5)
- A Performance Perspective on Web Optimized Protocol Stacks: TCP+TLS+HTTP/2 vs. QUIC
- QUICsand: Quantifying QUIC Reconnaissance Scans and DoS Flooding Events
- QUIC on the Highway: Evaluating Performance on High-rate Links
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- On the Interplay between TLS Certificates and QUIC Performance