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OpenSSL QUIC is experimental

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From: Daniel Stenberg via curl-library <curl-library_at_lists.haxx.se>
Date: Tue, 7 Jan 2025 16:11:54 +0100 (CET)

Hello,

The backend for HTTP/3 and QUIC called "OpenSSL QUIC" is still marked as
experimental.

There is just this single documented requirement left for this backend to
"graduate":

- Using HTTP/3 with the given build should perform without risking busy-loops

There is a PR [1] now that aims to fix this issue. The downside is that it
does not seem to improve performance at all.

The OpenSSL QUIC backend has some distinct drawbacks:

Upload speed: ngtcp2 is 2-4x faster.

Memory use: in some tests, OpenSSL uses 25x the amount of memory.

... but are those reasons enough for us to remain calling it experimental? I
lean towards "no". To let users decide for themselves if they want fast or
slow transfers.

[1] = https://github.com/curl/curl/pull/15909

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Received on 2025-01-07

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