Performance Theoretical 10 - Summary
What Can Be Analyzed? 📊
- Complex Animations 🎨
- Network Requests 🌐
- User Interactions 👆
- Dynamic Content 🔄
- Heavy Computation 💻
- Event Listeners 👂
- Rendering Performance 🖼️
- Memory Usage 📈
- JavaScript Execution ⏱️
- Layout Thrashing 📏
- Repaints and Reflows 🔄
- Long Tasks ⏳
- Third-Party Scripts 📜
- Web Workers 👷♂️
- Service Workers 🔄
- WebAssembly Performance 🏗️
- GPU Performance 🎮
Performance Tool Demo
Performance Tool Enhanced
Performance Tool Sections 🛠️
Summary 📊
- Overview: The Summary section provides a high-level overview of the performance recording.
- Purpose: Quickly identify major performance issues and understand overall performance
characteristics.
Bottom-Up 📈
- Overview: Shows time spent in each function, starting from the bottom of the call stack.
- Purpose: Identify which functions are consuming the most time.
Call Tree 🌲
- Overview: Displays a hierarchical view of the call stack and function execution times.
- Purpose: Understand code execution structure and identify performance bottlenecks.
Event Log 📝
- Overview: Lists all events during recording in chronological order.
- Purpose: Trace event sequences and understand operation timing.
Activity Types in Performance Profiler ⚡
Loading Events:
- 📄 Parse HTML: Browser parses HTML document
- ✅ Finish Loading: Network request completes
- 📥 Receive Data: Request data received
- 📤 Send Request: Network request sent
- 🔄 Resource Loading: Loading external resources
- 📦 Parse Resource: Processing loaded resources
Scripting Events:
- 🎬 Animation Frame Fired: Scheduled animation frame executes
- 📜 Evaluate Script: Script evaluation
- 📞 Function Call: Top-level function call
- ⏰ Install Timer: Timer creation
- 🔔 Timer Fired: Timer execution
- 🎯 Event: Event handler execution
- 🔧 GC: Garbage collection
- ⚡ Microtask: Microtask execution
- 👷 Program: Main thread script execution
Rendering Events:
- 📐 Layout: Browser calculates page layout
- 🎨 Paint: Browser paints content
- 🎭 Composite Layers: Browser composites final image
- 💫 Recalculate Style: CSS style calculations
- 🖼️ Update Layer Tree: Layer tree modifications
- 🔄 Invalidate Layout: Layout invalidation
System Events:
- 💾 Memory: Memory allocation and management
- 🔌 GPU: GPU-related activities
- 🌐 Network: Network operations
- 📱 Input: User input processing