Avoid quadratic complexity when coalescing text nodes in html in golang.org/x/net

When coalescing adjacent text nodes in addText and fosterParent, appending to an existing TextNode's Data via string concatenation (n.Data += text) reallocated and copied the accumulated string on every token. Inputs containing many short text runs separated by ignored end tags (such as "a</x>") caused O(n^2) allocations and byte copies. Accumulate coalesced text in per-node byte slices during parsing and materialize Data strings once at the end of parse.

Source published

27 Oct 2026 21:16:18 UTC

Source modified

27 Oct 2026 21:30:04 UTC

Observed here

27 Oct 2026 21:48:52 UTC

Source terms

OSV · upstream source license applies

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