The fold called artifact.parse on every artifact in the store and let it fail on the content blobs, which are most of a real store's bytes -- and a parse attempt pays a whole-bytes Z checksum before rejecting one. It now applies the reject-fast pre-screen frames --structural already uses, and reuses one plaintext buffer instead of allocating per artifact.

zit landing ls, release build: quarry 1.06s -> 0.15s, zit 2.19s -> 0.31s, libfossil 8.49s -> 0.91s. A forum-shaped store is unchanged, because there is nothing to reject there; it was never the slow case.

The screen only rejects. Every accept still takes the full parse, so nothing the fold would refuse can be admitted by being shaped like a card. closed check-in: 8776c0e5bb user: dmestas tags: landing-scan