Crate cvx_index

cvx-index — Temporal Index Engine for ChronosVector.

This crate provides distance computation and index structures for temporal vector search.

Layer 1: Distance Kernels

Three SIMD-accelerated distance metrics via [pulp]:

• metrics::CosineDistance — angular distance, range [0.0, 2.0]
• metrics::L2Distance — Euclidean distance squared
• metrics::DotProductDistance — negative dot product (for max inner product search)

All implement cvx_core::DistanceMetric and automatically dispatch to the best SIMD instruction set available at runtime (AVX-512, AVX2, NEON, or scalar).

Layer 4: Spatiotemporal Index (ST-HNSW)

hnsw::TemporalHnsw — temporal-aware HNSW with Roaring Bitmap pre-filtering, composite distance $d_{ST} = \alpha \cdot d_{sem} + (1-\alpha) \cdot d_{time}$, and trajectory retrieval.

Modules

hnsw

Hierarchical Navigable Small World (HNSW) graph index.

metrics

SIMD-accelerated distance metrics.