Memory Leak Guide

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Browser Developer Tools cho Phát Hiện Memory Leak ​

Sắp Ra Mắt

Hướng dẫn toàn diện về sử dụng browser developer tools để phát hiện và phân tích memory leak hiện đang được phát triển.

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  • Tạo nội dung theo tiêu chuẩn tài liệu của chúng tôi
  • Gửi pull request

Hướng dẫn này sẽ bao gồm:

  • Tính năng phân tích memory của Chrome DevTools
  • Memory profiling trong Firefox Developer Tools
  • Memory debugging với Safari Web Inspector
  • Memory investigation trong Edge DevTools
  • Kỹ thuật debug memory cross-browser

Nội Dung Sẽ Được Đề Cập ​

Chrome DevTools ​

Tính Năng Memory Tab ​

  • Heap Snapshots: Capture và phân tích memory usage
  • Allocation Timeline: Track memory allocations theo thời gian
  • Allocation Sampling: Lightweight memory profiling
  • Memory Usage Overview: Real-time memory monitoring

Performance Tab ​

  • Memory Timeline: Memory usage trong performance recording
  • Garbage Collection: GC events và impact analysis
  • Memory Pressure: Identify memory bottlenecks
  • Frame Analysis: Per-frame memory usage

Application Tab ​

  • Storage Analysis: LocalStorage, SessionStorage, IndexedDB usage
  • Cache Inspection: Service Worker và browser cache analysis
  • Cookie Management: Cookie storage impact
  • Web SQL: Database storage analysis

Firefox Developer Tools ​

Memory Tool ​

  • Heap Analysis: JavaScript heap inspection
  • Allocation Timeline: Memory allocation tracking
  • Dominators View: Memory retention analysis
  • Call Tree: Allocation call stack analysis

Performance Tool ​

  • Memory Track: Memory usage trong performance recordings
  • GC Events: Garbage collection impact
  • Memory Markers: Memory-related performance markers
  • Timeline Analysis: Memory patterns theo thời gian

Storage Inspector ​

  • Local Storage: Client-side storage analysis
  • Session Storage: Temporary storage inspection
  • IndexedDB: Database storage debugging
  • Cache Storage: Service Worker cache analysis

Safari Web Inspector ​

Timelines Tab ​

  • Memory Timeline: Memory usage tracking
  • Heap Allocations: Allocation event tracking
  • Memory Pressure: System memory impact
  • Resource Loading: Memory impact của resources

Storage Tab ​

  • Local Storage: Client storage inspection
  • Application Cache: Cache analysis
  • Databases: Web database inspection
  • Cookies: Cookie storage analysis

Audit Tab ​

  • Memory Audits: Automated memory issue detection
  • Performance Impact: Memory-related performance issues
  • Best Practices: Memory optimization recommendations
  • Resource Efficiency: Memory usage optimization

Microsoft Edge DevTools ​

Memory Tab ​

  • Heap Snapshots: Memory state capture
  • Usage Timeline: Memory allocation tracking
  • Leak Detection: Automated leak identification
  • Performance Impact: Memory performance analysis

Performance Tab cho Edge ​

  • Memory Metrics: Comprehensive memory tracking
  • GC Analysis: Garbage collection profiling
  • Memory Events: Memory-related performance events
  • Resource Impact: Memory usage bởi resources

Kỹ Thuật Cross-Browser ​

Common Memory Debugging Patterns ​

Heap Snapshot Comparison ​
  • Baseline snapshot creation
  • Memory leak identification
  • Growth pattern analysis
  • Retention path investigation
Timeline Analysis ​
  • Memory usage patterns
  • Allocation timing analysis
  • GC event correlation
  • Performance impact assessment
Memory Pressure Testing ​
  • Stress testing techniques
  • Memory limit simulation
  • Performance degradation analysis
  • Recovery behavior testing

JavaScript Memory Debugging ​

Console API Methods ​

javascript
// Memory usage monitoring
console.memory // Chrome-specific
console.log(performance.memory) // Memory info

// Manual GC trigger (trong DevTools)
// Available trong Chrome DevTools console
window.gc() // Khi --enable-precise-memory-info flag được set

Performance API ​

javascript
// Memory measurement
const memoryInfo = performance.memory
console.log(`Used: ${memoryInfo.usedJSHeapSize}`)
console.log(`Total: ${memoryInfo.totalJSHeapSize}`)
console.log(`Limit: ${memoryInfo.jsHeapSizeLimit}`)

Memory Leak Detection Patterns ​

javascript
// Monitoring object creation
const objectTracker = new Set()
function trackObject(obj) {
  objectTracker.add(obj)
  return obj
}

// Periodic memory checks
setInterval(() => {
  console.log(`Objects tracked: ${objectTracker.size}`)
  console.log(`Memory used: ${performance.memory?.usedJSHeapSize}`)
}, 5000)

Memory Analysis Workflows ​

Leak Detection Workflow ​

  1. Baseline Capture: Take initial heap snapshot
  2. Exercise Application: Perform memory-intensive operations
  3. Comparison Snapshot: Capture second heap snapshot
  4. Analysis: Compare snapshots cho growth patterns
  5. Investigation: Analyze retention paths và references
  6. Validation: Verify fixes với additional snapshots

Performance Analysis Workflow ​

  1. Performance Recording: Start performance timeline
  2. User Interaction: Simulate real user behavior
  3. Memory Timeline: Analyze memory patterns
  4. GC Analysis: Examine garbage collection impact
  5. Optimization: Identify memory optimization opportunities
  6. Validation: Measure improvement impact

Best Practices ​

Memory Debugging Techniques ​

  • Regular Snapshots: Periodic memory state capture
  • Baseline Comparison: Compare against known good states
  • Isolation Testing: Test individual features cho memory impact
  • Stress Testing: Push memory limits để identify issues
  • Timeline Analysis: Understand memory patterns theo thời gian

Performance Optimization ​

  • Memory Budgets: Set và monitor memory usage limits
  • Efficient Data Structures: Choose memory-efficient implementations
  • Cleanup Patterns: Implement proper resource cleanup
  • Lazy Loading: Load resources chỉ khi needed
  • Memory Pooling: Reuse objects để reduce allocations

Browser-Specific Features ​

Chrome DevTools Advanced Features ​

  • Memory Settings: Enable advanced memory features
  • Coverage Analysis: Identify unused code
  • Security Analysis: Memory-related security issues
  • Network Impact: Memory usage của network resources

Firefox Advanced Features ​

  • about:memory: Detailed browser memory analysis
  • Memory Reports: Comprehensive memory usage reports
  • Allocation Sites: Detailed allocation tracking
  • Compartment Analysis: Memory compartmentalization

Mobile Browser Debugging ​

Remote Debugging ​

  • Chrome Remote Debugging: Mobile Chrome memory analysis
  • Safari Remote Debugging: iOS Safari memory profiling
  • Firefox Remote Debugging: Mobile Firefox memory analysis
  • Edge Remote Debugging: Mobile Edge memory investigation

Mobile-Specific Considerations ​

  • Memory Constraints: Limited device memory impact
  • Battery Impact: Memory usage affecting battery life
  • Performance Impact: Memory pressure trên mobile devices
  • Touch Interactions: Memory impact của touch events

Đóng Góp ​

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