Uploaded February 2025 | Updated September 2026, 2 weeks ago
QUIC is a new transport protocol on top of UDP, transporting a large portion of the Internet traffic today. UDP I/O performance is crucial for QUIC implementations, where e.g. system call overhead can significantly impact throughput at high network speeds. To improve QUIC throughput, Firefox is switching to a modern UDP IO stack in Rust, using mechanisms like recvmmsg, and GRO across Linux, Windows, and Android.
This talk gives a high level overview of Firefox’s HTTP3 / QUIC / UDP stack, followed by a deep dive into the various performance improvements landing in Firefox. Learn how we are making Firefox even faster and how you too can leverage these techniques to optimize your application.
QUIC is a new transport protocol on top of UDP, transporting a large portion of the Internet traffic today. UDP I/O performance is crucial for QUIC implementations, where e.g. system call overhead can significantly impact throughput at high network speeds. To improve QUIC throughput, Firefox is switching to a modern UDP IO stack in Rust, using mechanisms like recvmmsg, and GRO across Linux, Windows, and Android.
This talk gives a high level overview of Firefox’s HTTP3 / QUIC / UDP stack, followed by a deep dive into the various performance improvements landing in Firefox. Learn how we are making Firefox even faster and how you too can leverage these techniques to optimize your application.
