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Jul 9, 2026 · Backend Development

From HTTP to Private RPC: Why Million‑QPS Systems Need Protocol‑Level Optimization

A large‑scale load test revealed that 70% of latency was spent packing and unpacking HTTP messages, prompting an analysis of why early‑stage HTTP is convenient, how text‑based formats and connection handling become costly at high frequencies, and why binary serialization, private protocols, and connection reuse are essential for reaching ten‑million QPS.