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Jul 9, 2026 · Backend Development

API Design for Ten‑Million QPS: From Generic to Specialized, BFF vs GraphQL

When a single generic endpoint that returns over thirty fields is stressed at ten‑million queries per second, it becomes the weakest link, exposing costs of over‑fetching, downstream amplification, cache inefficiency and coupling; the article dissects these issues and shows how specialized APIs, BFF layers, and GraphQL can address them, while weighing their trade‑offs.