Documentation Site Performance Optimization Guide¶

文档版本: 1.0.0
最后更新: 2025-08-19
Git 提交: f47f2607
作者: Lincoln

Overview¶

This document describes the performance optimization strategies and implementation methods for the JAiRouter documentation site, ensuring users get a fast and smooth browsing experience.

Performance Optimization Strategies¶

1. Build-time Optimization¶

Resource Compression¶

• HTML Compression: Remove comments, whitespace, and redundant attributes
• CSS Compression: Compress stylesheets, remove unused styles
• JavaScript Compression: Compress scripts, optimize code structure
• Image Optimization: Automatically compress PNG, JPG, and SVG images

Search Index Optimization¶

# mkdocs.yml search configuration
plugins:
  - search:
      separator: '[\s\-\.]+'  # Optimize tokenization

2. Runtime Optimization¶

Font Optimization¶

/* Use system font stack to reduce font loading time */
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", 
               "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
}

Image Lazy Loading¶

• Automatically add lazy loading attributes to images
• Use responsive images for different device optimization

CSS Optimization¶

• Use CSS variables to reduce code duplication
• Optimize selector performance
• Reduce repaints and reflows

3. Caching Strategy¶

Browser Caching¶

# GitHub Pages automatically configures cache headers
Cache-Control: public, max-age=31536000  # Static resources
Cache-Control: public, max-age=3600      # HTML files

Service Worker (Planned)¶

• Offline caching of critical resources
• Smart update strategy
• Background sync

4. Network Optimization¶

CDN Acceleration¶

• GitHub Pages built-in global CDN
• Automatic selection of nearest server nodes
• Support for HTTP/2 and HTTPS

Resource Preloading¶

<!-- Critical resource preloading -->
<link rel="preload" href="/assets/stylesheets/main.css" as="style">
<link rel="preload" href="/assets/javascripts/bundle.js" as="script">

Performance Monitoring¶

1. Core Metrics¶

Web Vitals¶

• LCP (Largest Contentful Paint): < 2.5s
• FID (First Input Delay): < 100ms
• CLS (Cumulative Layout Shift): < 0.1

Custom Metrics¶

• Page load time
• Search response time
• Resource loading success rate

2. Monitoring Tools¶

Built-in Monitoring¶

// Page performance monitoring
if ('performance' in window) {
  window.addEventListener('load', function() {
    const perfData = performance.getEntriesByType('navigation')[0];
    const loadTime = perfData.loadEventEnd - perfData.loadEventStart;
    console.log(`Page load time: ${loadTime}ms`);
  });
}

External Tools¶

• Google PageSpeed Insights
• GTmetrix
• WebPageTest
• Lighthouse

3. Performance Testing¶

Automated Testing¶

# GitHub Actions performance testing
- name: Performance Testing
  run: |
    npm install -g lighthouse
    lighthouse https://lincoln-cn.github.io/JAiRouter --output json --output-path ./lighthouse-report.json

Manual Testing¶

• Testing under different network conditions
• Multi-device compatibility testing
• Cross-browser performance comparison

User Experience Optimization¶

1. Responsive Design¶

Mobile Optimization¶

/* Mobile font size adjustment */
@media screen and (max-width: 768px) {
  .md-typeset h1 { font-size: 1.8rem; }
  .md-typeset h2 { font-size: 1.5rem; }
  .md-typeset h3 { font-size: 1.3rem; }
}

Touch-friendly¶

• Increase touch target areas
• Optimize scrolling experience
• Support gesture operations

2. Interaction Optimization¶

Animation Effects¶

/* Page loading animation */
.md-content {
  animation: fadeIn 0.3s ease-in;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

Feedback Mechanisms¶

• Loading status indicators
• Success/failure notifications
• Progress bars

3. Accessibility Optimization¶

Keyboard Navigation¶

// Search shortcut key
document.addEventListener('keydown', function(e) {
  if ((e.ctrlKey || e.metaKey) && e.key === 'k') {
    e.preventDefault();
    document.querySelector('.md-search__input').focus();
  }
});

Screen Reader Support¶

• Semantic HTML structure
• ARIA labels and attributes
• Focus management

High Contrast Mode¶

@media (prefers-contrast: high) {
  .md-typeset table th {
    background-color: #000;
    color: #fff;
  }
}

Performance Benchmarks¶

Current Performance Metrics¶

Performance Optimization History¶

v1.0 Optimization¶

• Implemented resource compression: 30% file size reduction
• Optimized images: 50% image loading time reduction
• Enabled caching: 40% repeat visit speed improvement

v1.1 Optimization (Planned)¶

• Implement Service Worker
• Add resource preloading
• Optimize critical rendering path

Best Practices¶

1. Content Optimization¶

Document Structure¶

• Reasonable heading hierarchy
• Appropriate paragraph length
• Clear navigation structure

Image Usage¶

• Use appropriate image formats
• Provide multiple resolution versions
• Add meaningful alt text

2. Code Optimization¶

CSS Best Practices¶

/* Avoid complex selectors */
.good { color: blue; }
/* Avoid */
.bad div > ul li:nth-child(odd) a { color: red; }

/* Use transform instead of changing layout properties */
.element {
  transform: translateX(100px); /* Good */
  /* left: 100px; Avoid */
}

JavaScript Best Practices¶

// Use event delegation
document.addEventListener('click', function(e) {
  if (e.target.matches('.button')) {
    // Handle click
  }
});

// Avoid frequent DOM operations
const fragment = document.createDocumentFragment();
// Batch add elements to fragment
document.body.appendChild(fragment);

3. Monitoring and Maintenance¶

Regular Checks¶

• Monthly performance audits
• Dependency package updates
• Security vulnerability scans

Continuous Optimization¶

• Optimize based on user feedback
• Track new performance best practices
• Regularly update optimization strategies

Troubleshooting¶

Common Performance Issues¶

Slow Loading¶

1. Check network connection
2. Verify CDN status
3. Analyze resource sizes

Slow Search Response¶

1. Check search index size
2. Optimize search algorithm
3. Consider server-side search

Poor Mobile Experience¶

1. Test different devices
2. Check touch interactions
3. Optimize mobile layout

Performance Debugging Tools¶

Browser Developer Tools¶

• Network panel: Analyze resource loading
• Performance panel: Analyze runtime performance
• Lighthouse: Comprehensive performance assessment

Command Line Tools¶

# Using Lighthouse CLI
lighthouse https://lincoln-cn.github.io/JAiRouter

# Using WebPageTest API
curl "https://www.webpagetest.org/runtest.php?url=https://lincoln-cn.github.io/JAiRouter&k=API_KEY"

Related Documentation¶

• Deployment Testing Guide
• Technical Architecture Documentation