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[Fusion] Reuse contiguous source response segments - #10582
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tobias-tengler
marked this pull request as ready for review
October 17, 2026 20:00
This was referenced Oct 25, 2026
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When a source response spans arena chunks that occupy adjacent ranges of the same byte array, Fusion still builds a linked sequence for the JSON reader. This allocates temporary sequence nodes and makes the reader process segmented input even though the bytes are contiguous.
This change recognizes the same backing array and exact adjacent offsets, then reads that range as one contiguous sequence. The original chunk table, packed data coordinates and document ownership stay intact. Gapped ranges and separate arrays use the existing linked sequence after the adjacency check.
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