⚡
MemoryDOMWeb WorkersLazy Loading
Build blazing fast web apps. Learn memory optimization, DOM performance, code splitting, and advanced techniques to deliver sub-second experiences.
JavaScript Performance Optimization
Master JavaScript performance optimization techniques to build fast, efficient web applications. Learn memory management, DOM optimization, lazy loading, web workers, and advanced performance strategies.
12
Topics
100+
Code Examples
~2 hrs
Total Reading
⚡ What You'll Learn
- ✓ Memory Management: Prevent memory leaks and optimize garbage collection
- ✓ DOM Optimization: Efficient DOM manipulation and layout performance
- ✓ Async Performance: Event loop optimization and async best practices
- ✓ Code Optimization: Algorithm efficiency and data structure selection
- ✓ Bundle Optimization: Tree shaking, code splitting, and lazy loading
- ✓ Advanced Techniques: Web Workers, virtual scrolling, and profiling
Performance Topics
12 Topics
🧠
Topic 1
Advanced
Memory Management & Garbage Collection
Understanding memory leaks, heap, stack, and garbage collection in JavaScript
12 min readPerformance Guide
🔄
Topic 2
Intermediate
Event Loop & Async Performance
Optimizing asynchronous operations and understanding the event loop
10 min readPerformance Guide
🌳
Topic 3
Intermediate
DOM Manipulation Performance
Efficient DOM operations, reflows, repaints, and layout optimization
11 min readPerformance Guide
⏱️
Topic 4
Intermediate
Debouncing & Throttling
Controlling function execution frequency for better performance
9 min readPerformance Guide
💤
Topic 5
Intermediate
Lazy Loading & Code Splitting
Loading resources on demand to improve initial load time
10 min readPerformance Guide
👷
Topic 6
Advanced
Web Workers & Multithreading
Offloading heavy computation to background threads
12 min readPerformance Guide
🎬
Topic 7
Intermediate
RequestAnimationFrame
Smooth animations and optimal rendering performance
10 min readPerformance Guide
💾
Topic 8
Intermediate
Memoization & Caching Strategies
Caching computed values and API responses for better performance
11 min readPerformance Guide
📊
Topic 9
Advanced
Algorithm Optimization
Time and space complexity, efficient data structures and algorithms
13 min readPerformance Guide
📦
Topic 10
Intermediate
Bundle Size Optimization
Tree shaking, code splitting, and reducing JavaScript bundle size
12 min readPerformance Guide
📜
Topic 11
Intermediate
Virtual Scrolling & Windowing
Rendering large lists efficiently with virtual scrolling
11 min readPerformance Guide
📈
Topic 12
Advanced
Performance Monitoring & Profiling
Using Performance API, profilers, and monitoring tools
14 min readPerformance Guide
🎯 Performance Best Practices
- 📊 Measure First: Use profiling tools before optimizing
- 🎯 Target Bottlenecks: Focus on the biggest performance issues
- ⚡ Optimize Loops: Reduce iterations and avoid nested loops
- 🗑️ Clean Up: Remove event listeners and clear timers
- 💾 Cache Results: Memoize expensive computations
- 🚀 Lazy Load: Load resources only when needed