Login

u/chegar999

Faster vector search in Elasticsearch with SIMD (deep dive into the new engine)
▲ 69 r/elasticsearch+1 crossposts

Faster vector search in Elasticsearch with SIMD (deep dive into the new engine)

Hey folks,

I’ve been working on improving vector search performance in Elasticsearch and wanted to share a deep dive into a new SIMD-accelerated vector search engine we’ve been building.

We focus on:

  • How SIMD is used to speed up vector similarity computations
  • What changes were made under the hood in Elasticsearch
  • Real performance gains and tradeoffs
  • When this approach actually helps (and when it doesn’t)

If you're working with kNN, embeddings, or large-scale retrieval systems, this might be useful.

Would love feedback from anyone running vector search in production — especially around bottlenecks or tuning challenges.

Blog post:
https://www.elastic.co/search-labs/blog/elasticsearch-vector-search-simdvec-engine

u/chegar999 — 10 days ago