gRPC vs REST in Microservices: Protocol Buffers, Multiplexing, and Streaming Benchmarks

In microservices architectures, internal east-west service-to-service traffic accounts for over 80% of aggregate data center network volume. Transitioning inter-service communication from REST JSON to gRPC delivers a 7x to 10x throughput surge while cutting serialization CPU overhead by more than 50%.

1. Foundational Advantages of gRPC

• Compact Binary Encoding: Protocol Buffers encode data into tightly packed binary streams devoid of repeated field keys, whitespace, and formatting tokens.
• HTTP/2 Multiplexing: Hundreds of concurrent RPC invocations traverse a single persistent TCP connection without Head-of-Line blocking.
• Schema-First Contract: .proto definitions serve as unalterable type-safe contracts with automated code generation across Go, Java, Python, and TypeScript.