February 2026
Intermediate to advanced
256 pages
8h 40m
Spanish
Content preview from Ingeniería del rendimiento web en la era de la IA (Spanish Edition)
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Capítulo 7. El costo de JavaScript
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Nunca ha sido tan fácil entregar páginas rápidamente, pero colectivamente no estamos alcanzando el objetivo.
JavaScript es un arma de doble filo: su rendimiento puede determinar si tus usuarios quedan encantados o frustrados. Si bien permite experiencias interactivas enriquecedoras y es esencial para crear las experiencias web dinámicas que se describen en la Parte II, su costo se paga en ciclos de CPU, ancho de banda de red y valiosos segundos del tiempo de los usuarios. La Parte III de este libro explora qué es lo que ralentiza las aplicaciones web JavaScript y cómo ofrecer excelentes experiencias de usuario mitigando esos costos.
Este capítulo analiza en profundidad y de forma pragmática el rendimiento de JavaScript en el navegador, centrándose en las limitaciones del mundo real y las soluciones modernas. En los capítulos 5 y 6 has visto cómo nuevas técnicas como la división de código, la hidratación y la programación pueden mejorar el rendimiento percibido. Aquí examinaré cómo el hardware y los componentes internos del navegador afectan a la ejecución de JavaScript y cómo los propios motores de JavaScript han evolucionado para ejecutar el código más rápidamente. Mi objetivo es ofrecerte un marco de alto nivel para pensar en el rendimiento de JavaScript y un conjunto de técnicas concretas para aplicar.
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.