http: replace picohttpparser with a Rust parser; classify headers once and build fetch Response headers lazily - #37132

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dylan-conway wants to merge 8 commits into

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claude/picohttpparser-replacement-7287be

Commits on Aug 7, 2026

Replace vendored picohttpparser with a Rust HTTP/1.1 response-head parser and chunked decoder
dylan-conway
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7b47b76
verify-baseline: allowlist the runtime-dispatched IndexOfHttpCtl highway kernels
dylan-conway
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ee00fe6
fetch: classify response header names once at parse time and build FetchHeaders only when a Response's headers are actually read
dylan-conway
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05ccec9
http client: skip re-parsing an accumulating response head until the new bytes could complete it
dylan-conway
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fb86f21
Address review: keep Header::ZERO all-zero, assert HeaderName count, gate the head prefilter on a parsed prefix, realize headers inside Init::clone
dylan-conway
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996c7a4
bench: require integer port and counts in response-headers.mjs
dylan-conway
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ef563fb
http client: treat Content-Type as SSE only when the media type is exactly text/event-stream
dylan-conway
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58c2a53
bench: use Number.isSafeInteger for response-headers.mjs counts
dylan-conway
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537b5ce