Alibaba Cloud Big Data AI Platform

Nov 6, 2025 · Artificial Intelligence

How GPU‑Accelerated NN‑Descent Boosts Vector Search Speed by Up to 13×

This article explains how unstructured multimedia data is transformed into vectors for similarity search, introduces GPU parallelism and the NN‑Descent algorithm to replace traditional HNSW indexing in OpenSearch, and presents benchmark results showing up to a thirteen‑fold speed improvement while maintaining comparable recall.