Eseniia

Performance Optimization

Learn how to optimize your web application's performance through best practices and advanced techniques.

🔍 View Techniques

Key Optimization Techniques

Critical Rendering Path

Optimize rendering performance by deferring non-critical resources and minimizing render-blocking scripts. 

<link rel="preload" href="styles.css" as="style">
<script defer src="script.js"></script>

Efficient Resource Loading

Use lazy loading, image optimization, and content delivery networks (CDns) to reduce load times. 

<img src="image.png" 
     loading="lazy"
     decoding="async"
     width="800"
     height="600">

JavaScript Execution

Minimize synchronous operations, use Web Workers for intensive tasks, and optimize code execution. 

requestIdleCallback(() => {
  // Heavy computation here
});

Caching Strategies

Implement HTTP caching, Service Workers, and efficient storage strategies for faster repeat visits. 

<meta http-equiv="cache-control" content="public, max-age=3600">

Performance Metrics That Matter

LCP (ms)

2.3s

Largest Contentful Paint - Measure loading performance of the page.

FID (ms)

100ms

First Input Delay - Measures responsiveness to user interactions.

CLS

0.1

Cumulative Layout Shift - Measures visual stability.

Tools and Techniques

Web Vitals Dashboard

Analyze and track critical performance metrics across devices and networks.

Web Vitals Dashboard

Performance Lab

Interactive performance testing suite with real-time metrics visualization.

Performance Lab