Patrones de diseño en Node.js
Qué es Node.js y cómo impulsa tu negocio
Patrones de diseño esenciales en Node.js
Patrón Singleton y Factory en JavaScript
Implementación práctica de Singleton y Factory en JavaScript
Implementación del patrón Observer con EventEmitter en Node.js
Implementación de Middlewares en Node.js sin Express
Decorators e inyección de dependencias en JavaScript
Flujo de Datos con Node.js
Aprende qué son Buffer y Streams en Node.js
Cómo utilizar streams y pipelines en Node.js
Cómo funciona el Event Loop en Node.js
Qué es Libuv y cómo maneja la asincronía en Node.js
Estrategias para ejecutar código asíncrono en Node.js
Debugging y Diagnóstico en Node.js
Cómo utilizar el Debugger en Node.js para solucionar problemas
Uso de Diagnostic Channels en Node.js para observabilidad y diagnóstico
Instrumentación y métricas clave en performance para aplicaciones Node.js
Control de errores globales y manejo de señales en Node.js
Implementación Eficiente de Logs con Pino en Node.js
Performance en Node.js
Análisis del event loop en aplicaciones Node.js usando Nsolid
Cómo Diagnosticar y Solucionar Memory Leaks en Aplicaciones Node.js
Optimizar rendimiento en Node.js con Worker Threads y Child Processes
Optimiza y Escala Aplicaciones Node.js con Técnicas de Caching
Creando CLIs con Node.js
Cómo crear aplicaciones CLI con Node.js
Cómo Crear un CLI con Minimist y Manejar Argumentos en Node.js
Creación de un CLI con Node.js y Google Generative AI
Creación de Chat con IA usando CLI en Node
Cómo Crear e Instalar tu Propio CLI de Node con npm
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Understanding the Event Loop in Node.js is essential for any advanced developer. This mechanism allows efficient and asynchronous execution of JavaScript code. Although it is commonly said that JavaScript is single threaded, thanks to the Event Loop, Node.js delegates tasks to the operating system making the execution effective and not strictly single threaded.
What is the Event Loop and why is it important in Node.js?
The Event Loop is the central mechanism that allows managing asynchronous tasks in Node.js. Its main function is to delegate certain operations to the operating system, taking advantage of kernel resources for tasks such as file reading or network operations. It is crucial to understand its inner workings in order to optimize and control code execution.
What are the Event Loop phases in Node.js?
The Event Loop has several clearly defined phases. Each has a specific purpose in the execution of code within Node.js.
What happens in the Timers phase?
In this phase, functions defined with setTimeout or setInterval are executed. You must keep in mind that the specified execution time is not exact, because if the Event Loop is very busy, the execution may be delayed. The system checks if the set time has passed; if it has expired, it executes the corresponding function.
What happens in the Pending Callbacks phase?
This phase interacts directly with the operating system to detect which callbacks have already finished. Although it does not directly execute the callbacks, it prepares and queues the code to be executed later.
What is Idle or Prepare?
It is a private phase managed internally by Node.js, over which you have no control. When there are no tasks to execute, the Event Loop is kept waiting here.
What role does the Poll phase play?
Poll is perhaps the most important phase. This is where the previously prepared callbacks are actually executed. In addition, this phase decides whether or not to block the execution of synchronous code, such as word processing or calculations, and may temporarily interrupt asynchronous code.
What does the Check phase do in the Event Loop?
In this stage, the tasks scheduled by setImmediate are specifically executed. This function allows code to be executed right after the Poll phase, offering a certain control advantage.
What is the Close Callbacks phase?
Close events, such as those associated with closing sockets or streams, are executed here. This phase is the last one before the Event Loop returns to the start.
What is Process NextTick and how does it complement the Event Loop?
Process.nextTick makes it easy to execute micro-tasks outside of the main Event Loop cycle. Although it provides additional control, if overused it can block the main loop, preventing other important tasks from being performed on time.
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