FTS5 vs Cloudflare Vectorize: A/B Results on When Keyword Beats Semantic Search

May 20, 2026

Search-Engine-Selection, Embedding-Pipeline-Design, Ab-Testing-Search-Relevance

Fts5, Vectorize, Cloudflare, Semantic-Search, Full-Text-Search, Bm25, Embeddings, Bge-Base-En, Search-Relevance

Fts5, Sqlite, Vectorize, Workers-Ai, Cloudflare-Workers, D1

FTS5 vs Cloudflare Vectorize#

The “FTS5 vs vectors” debate is usually hand-wavy. Both sides cite plausible reasons, neither runs the same queries through both engines on the same corpus, and the conclusion is whichever one the author shipped. With identical data and identical queries you can measure exactly where each wins.

The result: FTS5 and Vectorize have non-overlapping strengths. The right answer for most knowledge-base workloads is “ship both” behind an opt-in flag — not pick one. This page is the measurements, the cost math, and the dual-engine pattern.

Building an API with Cloudflare Workers and D1: From Zero to Production

February 22, 2026

Serverless

Intermediate

Cloudflare-Worker-Development, D1-Schema-Design, Api-Design, Typescript-Development, Wrangler-Deployment

Cloudflare-Workers, Cloudflare-D1, Cloudflare-Kv, Api-Development, Typescript, Wrangler, Cors, Rate-Limiting, Fts5, Full-Text-Search, Serverless-Api, Tutorial

Cloudflare-Workers, Wrangler, Cloudflare-D1, Cloudflare-Kv, Typescript, Npm

Building an API with Cloudflare Workers and D1#

This tutorial walks through building a production API on Cloudflare Workers with a D1 database, KV caching, rate limiting, full-text search, and request logging. The patterns come from a real production deployment – not a toy example.

By the end you will have: a TypeScript Worker handling multiple API routes, a D1 database with FTS5 full-text search, KV-based caching and rate limiting, CORS support, request logging with IP hashing for privacy, and a deployment to Cloudflare’s global network.