![]() REST is more suitable to expose your APIs to external services.It could be possible in the near future when GRPC is fully evolved. It will not be suitable to currently expose your service as a GRPC as there are no APIs available for external services to integrate. GRPC is mostly suitable for internal microservices where low latency and high throughput might be needed.You can make a call using a browser, postman, curl, etc REST call doesn’t need a client set up.GRPC would require you to set up a client locally to be able to make a GRPC call.The API contract is mostly just a document using OPEN API or swagger and hence it is loose. ![]() REST doesn’t have any such restriction.The API contract is defined by the proto file and is strict. GRPC will not allow you to send int for a field where a string is expected. So that in a way provides type safety to GRPC. Since protocol buffers are used for code generation in the case of GRPC.REST also provides code generation through Swagger, OPEN API but that is just an extra thing provided and it is not as effective as code generation by protocol buffers.In fact with protocol buffers code generation is a must thing to use GRPC. Since GRPC is built on top of protocol buffers it provides automatic code generation.It uses JSON, XML which for representing the same data take more size than protocol buffers. REST over HTTP/1 will be slower than GRPC.GRPC can utilize each TCP connection very effectively.Due to these two reasons, GRPC is very fast. Plus GRPC uses protocol buffers internally and since protocol buffers are binary data and have less size, they are transferred over a network fast. HTTP/2 has introduced several performance optimizations over HTTP/1 such as Since GRPC inherently uses HTTP/2 so all the performance optimizations applied to HTTP/2 automatically are available in GRPC.In REST only the client talks to the server. So REST only provides a unary way of communication. Basically, you send the request and then you get the response. ![]()
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