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This article provides a detailed comparison along with performance metrics for both protocols. In this article, we’ll be exploring how you can use HTTP/2 in your service. The most popular way to do this is to use gRPC by Google. It is a web framework used to connect multiple services using HTTP//2. Let’s create a simple Hello World service in Java using Java. The service Greeter sends a greeting rpc SayHello (HelloRequest) and returns a HelloReply.