Kévin Dunglas on Mythryl: “Just improved Caddy performance by fixing header casing on the hot…”

Just improved Caddy performance by fixing header casing on the hot path! 🚀 When using Go's net/http, make sure to use canonical HTTP header casing (e.g. Content-Type instead of content-type). Non-canonical keys trigger string formatting and allocations on every lookup. github.com/caddyserver/...

github.comcaddyhttp: use canonical header key casing to avoid re-canonicalization by dunglas · Pull Request #7911 · caddyserver/caddySummary http.Header.Get/Set re-canonicalize the passed key and allocate a new string whenever it isn't already in canonical MIME header form. Three call sites in the codebase were passing non-c...

30/7/26, 1:09 pm0 reposts2 likes

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