Understanding gRPC

gRPC is a high-performance, open-source Remote Procedure Call (RPC) framework that enables services to communicate efficiently across networks as if they were local function calls. It has become a popular choice for building scalable APIs, particularly within microservices and real-time systems. The efficiency of gRPC is driven by two primary building blocks: HTTP/2: Used as the transport protocol, it supports long-lived connections and multiplexed streams, allowing multiple calls to run in parallel without blocking. It is active from the moment the connection is established to the moment data is sent and received. It provides the mechanism for keeping connections open (long-lived) and ensuring multiple, non-blocking calls can run in parallel (multiplexed streams). Example : Imagine a single gRPC connection is like a large tunnel between your Frontend Service and your Backend Service. The Frontend Service sends a request to the backend to fetch a user profile (Call A). Immediately…