gRPC and Protocol Buffers for Mobile API Backends

Benchmarks show gRPC + Protobuf delivers roughly 60% smaller mobile payloads than REST+JSON.

On mid-range devices, REST+JSON wire payload = 48.2 KB; gRPC+Protobuf = 18.7 KB.

Android serialization median: REST+JSON 12.3 ms vs gRPC+Protobuf 7.1 ms (−42%).

Android deserialization median: REST+JSON 14.8 ms vs gRPC+Protobuf 9.2 ms (−38%).

Beyond raw performance, gRPC's real advantage is a schema-first contract and cross-platform codegen pipeline.