Overall it seems accurate and fair (which I think some Alpine ppl were worried it might not be), but I do think it was missing a little bit of context.
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In regards to RFC 5966 (https://tools.ietf.org/html/rfc5966 ), there is some relevant content just below the quoted text:pic.twitter.com/q9odhkZ3oj
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A UDP response fits approx. (496-strlen(hostname))/16 A records or (496-strlen(hostname))/28 AAAA records. That's 15 or 8 even for a max-length (255) hostname. Far more than you can comfortably (without major delays) try connecting to in a fallback loop.
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My choice not to do TCP in musl's stub resolver was based on an interpretation that truncated results are not just acceptable but better ux - not only do you save major round-trip delays to DNS but you also get a reasonable upper bound on # of addrs in result.
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This is a really good point - for applications that need exact specialized behavior of some sort rather than just getaddrinfo for connecting to hosts, a specialized DNS library is what you probably want.https://twitter.com/justincormack/status/994656216360992768 …
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