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Chinesezjc
4fd0068fb7
The review's critical: the open-merge branch re-joined and re-walked the whole held text per frame, so k tiny open frames cost O(k * budget) (thousands of 1-byte frames against a near-64 MiB budget would re-traverse hundreds of GB and block the host event loop). The host now holds a fragment ARRAY with an incrementally billed cost — each fragment's jsonStringCostUpTo walks only its own text — and the closing frame bills only its own content, so the merged entry's wire cost is charged exactly once, split across the fragments. The child bills symmetrically: the first open fragment pays quotes+separator, each continuation pays only its content, matching the host ledger (the review's warning: per-fragment full billing truncated a 16-char merged entry under maxLogBytes: 64 that costs only 19 bytes as one entry). Regression cases: 16 single-character flushes merge to one whole entry; a closing frame that overflows the remaining budget truncates to the marker; a closing frame after an open flood already truncated the ledger is a no-op; and a forged open-frame flood stays bounded by the ledger. The closing-frame post-truncation guard is an invariant-false branch (an open frame that would trip the ledger resets openParts, so a non-empty hold implies no truncation) and carries a v8 ignore with that reason.