Tags and Properties for Check-in 9b4f7ae683
- branch=sub-manifest inherited from [9b8bad477a]
- sym-sub-manifest inherited from [9b8bad477a]
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2026-08-06
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| 16:55 |
memo: evict by recency instead of freezing at the budget
SubManifestMemo filled to 4 MiB then stopped interning, so the retained set froze on whatever arrived first and later resolves paid a lookup that could not hit. Measured at 30,000 files: working set 7,494 KiB against a 4,096 KiB ceiling, costing 23 points of hit rate (92->69%) and ~27% of wall time. Now per-entry allocation with an LRU list, trimmed in beginWalk. Eviction cannot happen in resolve: TreeWalk frames borrow the views that resolved them, so freeing mid-walk is a use-after-free -- the arena hid that by never freeing. Budget 64 MiB, from the measured working set scaled to pkgsrc. Same corpus: 92%, 0 evicted, 26s->19s. Unchanged where budget isn't binding. repository.zig and git_import_verify.zig halves landed in 76a2905055, swept in by a concurrent commit. (#35) check-in: 9b4f7ae683 user: dmestas tags: sub-manifest | |
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2026-07-27
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| 19:29 |
Sub-manifest: card alphabet, artifact type, and the specification's vectors
Adds S as the twenty-second card letter and SUBMANIFEST as the ninth artifact type, per draft-fossil-submanifests-00 sections 3 and 4. Type determination reassigns after the card scan rather than during it, so no type is committed while cards are still being read (section 9.1). Reading and classification only: no tree walk, no emission. The draft's seven appendix vectors ship alongside, each named by the SHA3-256 the draft states and checked by a test that recomputes it. check-in: 9b8bad477a user: dmestas tags: sub-manifest | |