February 2026
Intermediate to advanced
256 pages
8h 51m
French
Content preview from Ingénierie des performances web à l'ère de l'IA (French Edition)
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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.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.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.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.
Chapitre 7. Le coût de JavaScript
Cet ouvrage a été traduit à l'aide de l'IA. Tes réactions et tes commentaires sont les bienvenus : translation-feedback@oreilly.com
Il n'a jamais été aussi facile de livrer des pages rapidement, mais on n'atteint pas collectivement l'objectif.
JavaScript, c'est un peu comme une arme à double tranchant : ses performances peuvent faire la différence entre des utilisateurs ravis ou énervés. Même s'il permet des expériences interactives super cool et est super important pour créer les expériences web dynamiques dont on parle dans la partie II, il a un coût en termes de cycles CPU, de bande passante réseau et de précieuses secondes pour les utilisateurs. La partie III de ce livre explore ce qui ralentit les applications web JavaScript et comment offrir une super expérience utilisateur en réduisant ces coûts.
Ce chapitre examine de manière approfondie et pragmatique les performances de JavaScript dans le navigateur, en se concentrant sur les contraintes du monde réel et les solutions modernes. Tu as vu dans les chapitres 5 et 6 comment de nouvelles techniques telles que le fractionnement de code, l'hydratation et la planification peuvent améliorer les performances perçues. Ici, j'examinerai comment le matériel et les composants internes du navigateur affectent l'exécution de JavaScript et comment les moteurs JavaScript eux-mêmes ont évolué pour exécuter le code plus rapidement. Mon objectif est de te donner un cadre général pour réfléchir ...
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Read now
Unlock full access
More than 5,000 organizations count on O’Reilly
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.