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HTML Tutorial
HTML · LESSON 55

Performance Best Practices

By Ratan Updated: 16 Oct 2026

Optimize web page loading speed using script async/defer, preloading assets, and resource hints.

Level: Beginner to Advanced
Duration: ~60 Mins Deep-Dive

1. Core Web Vitals & Web Performance

A fast web application delivers higher candidate satisfaction, reduces bounce rates, and ranks higher in Google searches. Web performance starts with clean, efficient HTML structure.

2. Critical Performance Optimizations

A. Resource Hints: preconnect & preload







B. Non-Blocking Script Loading: defer vs async

Attribute Parsing & Execution Behavior
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