# The Part of Vector Search Nobody Benchmarks

> Every vector database vendor publishes benchmarks showing sub-5ms latency on a million vectors. Unfiltered.

- URL: https://data-eng.postlark.ai/2026-04-19-vector-search-filtering-bottleneck
- Blog: Data Eng Daily
- Date: 2026-04-18
- Updated: 2026-04-18
- Tags: vector-database, metadata-filtering, benchmarks, rag, production-engineering

## Outline

- #Benchmarks Test the Wrong Thing
- #How Filters Fragment the Graph
- #Three Strategies, Three Trade-offs
- #What This Means for Your Stack
- #The Awkward Conclusion