Overview

The Efficient API: GraphQL or REST? addresses a problem every modern engineering team eventually hits: your application works, users are growing, but performance is slipping, costs are rising, and every API decision feels harder than it should be. Endpoints multiply. Payloads bloat. Mobile clients struggle on real networks. Backend teams argue over REST versus GraphQL without a clear, defensible answer. This book cuts through that noise. Rather than treating API design as ideology, The Efficient API reframes it as an engineering discipline grounded in latency budgets, network behavior, caching mechanics, and long-term system evolution. It shows how REST and GraphQL actually behave under production constraints, where each excels, where each breaks down, and how to choose intentionally instead of by trend. You will see how efficient APIs are designed from the wire inward. HTTP is treated as a performance tool, not a formality. GraphQL is examined as a coordination layer, not a silver bullet. Real architectural trade-offs are exposed, especially the hidden costs that only surface at scale. By the end of the book, you will be able to: Design REST APIs that minimize over-fetching, maximize cache effectiveness, and scale cleanly under load. Use GraphQL where it genuinely reduces latency and client complexity, without sacrificing control or stability. Understand how payload shape, query patterns, and resolver behavior impact real-world performance. Make informed API decisions for mobile, web, and distributed systems with tight latency budgets. Reduce network chatter, cloud spend, and operational risk without slowing developer velocity. Plan API evolution strategies that avoid breaking clients or accumulating technical debt. This is not a feature checklist or a framework comparison. It is a practical guide to building APIs that respect bandwidth, battery life, and backend resources, while still supporting fast-moving product teams. If you are building full-stack applications, scaling APIs beyond early success, or deciding how your next system should communicate, this book gives you the clarity to choose correctly and the confidence to defend that choice. Build APIs that perform under pressure. Make decisions that scale. Get your copy of The Efficient API: GraphQL or REST? today.

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