Before revision:  It also shows substantial retrieving speed advantages, i.e. for an index with 1 million images, VisualSparta gets over 391x speed up compared to standard vector search . Experiments show that this speed advantage even gets bigger for larger datasets because VisualSparta can be efficiently implemented as an inverted index.
After revision:  It also shows substantial retrieving speed advantages, i.e. , for a 1 million images, VisualSparta gets over 391x speed up compared to standard vector search . Experiments show that this speed advantage even gets bigger for larger datasets because VisualSparta can be efficiently implemented as an inverted index.