SQLite FTS5

Tencent Cloud Developer

Feb 20, 2023 · Mobile Development

iOS WeChat Full-Text Search Technology Upgrade: Selection and Optimization

iOS WeChat’s full‑text search was upgraded by selecting SQLite FTS5, creating a VerbatimTokenizer with multi‑level delimiter support, optimizing table formats to cut index size by 30 %, improving batch index updates and parallel search logic, resulting in 40‑60 % faster query latency.