05:07
2026-06-24
dev.to
developer-tools
FTS5 on Cloudflare D1 cut my Korean keyword search from 220ms to 22ms — here's what almost broke it
A developer cut Korean keyword search latency from 220ms to 22ms on Cloudflare D1 by migrating to FTS5, but encountered pitfalls with negative bm25() scores and Korean tokenization. The developer miti…