Chris,

we had a recent IEEE ICDCS work related to this subject:
https://sk-alg.tbm.tudelft.nl/aaron/files/pre-icdcs2024.pdf

not directly offer any answer, but some (hopefully relevant) takeaway:
- CDN resources constitute the major portion of web content, and a small number of large CDN providers dominate
resource provision across a diverse range of webpages
- the dominance of giant CDN providers further results in centralizing CDN resources on a few providers, posing risks of congestion problem

Aaron


On 24.06.2024 13:25, Chris Box wrote:
I'd like to ask your view on why QUIC apparently isn't growing as a
percentage of web traffic. Cloudflare's excellent stats show it stubbornly
sitting around 30% for the past year:
https://radar.cloudflare.com/adoption-and-usage/?dateRange=52w

HTTP/3 delivers significant performance gains, so in theory browsers,
networks, CDNs and origins should all be incentivised to enable it. Yet I
don't see any growth. It seems 78% of browsers support it
https://caniuse.com/http3. Fastly fully enabled it two years ago.
https://www.fastly.com/blog/http-3-and-quic-are-now-available-for-our-entire-customer-base-at-no-additional-charge/
The
lack of support in Apache wouldn't explain the browser-to-CDN part.

Could it be that the major constraint is networks blocking UDP? Or
something else? Just wondering what action needs to be taken to remove
these roadblocks.

Chris

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