Performance Fundamentals in Front End Architecture

Introduction

Performance in front-end architecture is crucial for delivering a seamless user experience. This lesson covers the fundamentals of performance optimization, helping you understand key concepts, best practices, and how to implement them effectively.

Key Concepts

• **Render Performance**: The efficiency with which a browser can display content.
• **Load Time**: The duration it takes for a web page to fully load.
• **Time to Interactive (TTI)**: The time it takes for a page to become fully interactive.
• **First Contentful Paint (FCP)**: The time it takes for the first piece of content to appear on the screen.

Best Practices

1. Minimize HTTP Requests: Reduce the number of resources loaded by combining files.
2. Optimize Images: Use the correct format and size for images.
3. Leverage Browser Caching: Allow browsers to cache resources for faster loading times.
4. Minify CSS and JavaScript: Remove unnecessary characters from code to reduce file size.
5. Use Content Delivery Networks (CDNs): Serve content from locations closer to users.

Code Examples

Here’s an example of how to optimize image loading using the loading="lazy" attribute:

<img src="image.jpg" alt="Description" loading="lazy">

This attribute tells the browser to load images only when they are about to enter the viewport, thus improving performance.

FAQ