<ul><li>When developing microservices with NestJS, it's important to understand the concepts of blocking and non-blocking I/O.</li><li>A blocking model refers to operations that pause the flow of execution until a task is completed.</li><li>NestJS is built on Node.js and encourages the use of non-blocking I/O operations for better scalability and performance.</li><li>Using async/await for I/O operations and offloading heavy tasks to processing queues are recommended best practices in NestJS.</li></ul>

Blocking vs Non-Blocking I/O in Microservices with NestJS

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