Dubbo

Dubbo is optimized for high-performance communication, with protocols like Triple (gRPC-compatible) ensuring efficient service calls in distributed systems, as highlighted in its feature set.

It supports multiple RPC protocols including Triple, Dubbo2 TCP, and REST, allowing developers to choose based on project needs, as detailed in the README's protocol sections.

With Spring Boot Starters, Dubbo integrates easily into Spring-based projects, enabling quick setup of microservices with service discovery and observability, as shown in the 'Microservices with Spring Boot' guide.

Dubbo provides out-of-the-box support for metrics, distributed tracing, and monitoring, essential for maintaining reliability in microservices, as mentioned in its core features.