Wu Shixiong's Large Model Academy

Nov 16, 2025 · Artificial Intelligence

How to Slash RAG First‑Token Latency: Practical Engineering Strategies

This guide breaks down the three layers of a RAG pipeline—embedding, vector retrieval, and system architecture—and provides concrete engineering tactics such as batch embedding, async concurrency, caching, ANN indexing, partitioning, connection pooling, and async pipelines to dramatically reduce Time‑to‑First‑Token latency.