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HTTP/3 is enabled by default.

Using a modern transport protocol, QUIC, enables HTTP/3 to be what HTTP/2 aimed to be: fault-tolerant and massively parallel. Add way faster handshakes on top on that, and HTTP/3 is groundbreaking. You can naturally disable the feature.

A custom implementation of QUIC using io_uring is embedded in Kvarn. This gives you the power of the latest protocol with the fastest IO platform.