Unreleased

Upgrade Notes

• Loading an InMemoryImageEmbeddingStore file saved by an earlier version raises ValueError. Build the store from its images again and save it.

• InMemoryImageEmbeddingStore.save_to_disk ignores embeddings on a store on an HNSW graph and emits a FutureWarning, since the file holds the graph with the embeddings in it.

Performance

• A store on an HNSW graph saves the graph and loads it back without building it again. Loading a store of 100 000 embeddings of dimension 512 went from 22.7 s to 0.2 s, and saving it from 2.4 s to 0.2 s.

  Specs: 16 threads, 30 GB RAM, Python 3.14.3, NumPy 2.4.6, safetensors 0.8.0.

Bug Fixes

• A loaded HNSW store returns the same neighbors as the store that was saved. Before, the graph was built again on load, which with several threads could return different neighbors.