DiskANN v0.57.0

Breaking Changes

Flat search visitors are now query-aware (#1359)

• flat::FlatIndex  has been removed. The search entry point is now the free function flat::knn_search, and the DistancesUnordered visitor is constructed per-query rather than reused. The ElementRef, QueryComputer, and QueryComputerError associated types and the visitor GAT have also been removed. DistancesUnordered now yields (id, distance) pairs directly.

Migration: Callers of the old FlatIndex/visitor API should:

1. Drop FlatIndex and construct your DistancesUnordered visitor directly for the query being searched.
2. Replace calls into the removed wrapper with flat::knn_search(&mut visitor, k, processor, query, &mut output).
3. Remove any ElementRef/QueryComputer implementation, fuse scanning and distance computation directly in your DistancesUnordered::distances_unordered implementation.

All Changes

• Make UnalignedSlice Send and Sync. by Mark Hildebrand (@hildebrandmw) in #1348
• Bump actions/checkout from 4.4.0 to 7.0.1 in the github-actions group by Dependabot (@dependabot)[bot] in #1344
• Deduplicate virtual start point edges during disk serialization by juchen-ms (@partychen) in #1350
• Fix alpha pruning documentation by xinyuwen2 in #1351
• Bump the github-actions group with 4 updates by Dependabot (@dependabot)[bot] in #1356
• Add Neon Inner product u4*u4 kernel by pfoxARM in #1353
• Strengthen arguments to robust_prune. by Mark Hildebrand (@hildebrandmw) in #1358
• Allow inspection of the paged search accessor. by Mark Hildebrand (@hildebrandmw) in #1364
• Make flat search visitors query-aware by juchen-ms (@partychen) in #1359
• Add Neon inner-product kernel for USlice<2> with spherical wiring by pfoxARM in #1363

New Contributors

• pfoxARM made their first contribution in #1353

Full Changelog: v0.56.0...v0.57.0