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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Node.js stands out for its ability to handle asynchronous operations, but how exactly does it achieve this? A fundamental piece in this task is Libuv, an Open Source library created especially for Node.js. Libuv makes asynchrony possible by implementing the Event Loop, interacting directly with the operating system to handle key tasks such as TCP and UDP communications, as well as input and output operations.
What is Libuv for and how does it work in Node.js?
Libuv is essential within the Node.js environment because:
- It implements the Event Loop to handle asynchronous operations.
- It handles socket communications using TCP and UDP.
- It controls the input and output operations required by Node.js directly with the operating system.
Because of its cross-platform feature, Libuv has a specific build for each operating system supported by Node.js: Linux, Mac and Windows.
What is a microtask in Node.js and what is Process NextTick?
Within the asynchronous handling in Node.js, microtasks are executed before the regular Event Loop tasks, being Process NextTick one of them. This microtask allows executing functions outside the traditional Event Loop cycle, giving them higher priority.
How does knowledge of the Event Loop impact the execution of JavaScript code?
By clearly understanding the Event Loop and how it processes the different asynchronous phases, it is possible to determine the sequence in which code functions will be executed. For example, when executing a script that includes:
- Process NextTick (Microtask)
- SetTimeout (Timers)
- SetImmediate (after Poll)
- I/O operations
The execution follows this order:
- Start and end of the script are printed immediately.
- Pending microtasks are executed
(Process NextTick). - It continues with the tasks scheduled as
SetTimeout. - Proceed with
SetImmediate. - Finally, the input and output (I/O) operations are executed, as these are the slowest and require going through specific phases of the Event Loop.
Understanding these dynamics is key to correctly implement asynchrony in Node.js.
Would you like to learn more about asynchronous parallelism patterns? Stay tuned for upcoming classes to learn more practical details and optimize your Node.js programming.
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