Optimization practices for content-based website loading

The core value of content-based websites lies in providing high-quality information, while loading speed directly impacts user experience and SEO rankings. Optimization techniques need to cover the entire pipeline, from resource compression to rendering strategies, with special handling required for typical scenarios like mixed text-image layouts and long lists. Below are battle-tested optimization solutions.

Resource Loading Strategy Optimization

Critical Resource Preloading

Use <link rel="preload"> to load above-the-fold CSS and font files in advance, with the crossorigin attribute to avoid duplicate requests:

<link rel="preload" href="/css/main.css" as="style" crossorigin>
<link rel="preload" href="/fonts/Inter.woff2" as="font" crossorigin>

Dynamic Import of Non-Critical Resources

Implement component-level code splitting via import(), with webpack magic comments to define chunk names:

const Comments = () => import(/* webpackChunkName: "comments" */ './Comments.vue')

Intelligent Prefetch Strategy

Prefetch resources based on user behavior prediction, such as when hovering over pagination buttons:

document.getElementById('pagination').addEventListener('mouseover', () => {
  import('./next-page.js')
})

Media Resource Handling Solutions

Adaptive Image Service

Use <picture> element with CDN for resolution adaptation, including WebP fallback:

<picture>
  <source 
    srcset="img-320w.webp 320w, img-640w.webp 640w"
    type="image/webp"
    sizes="(max-width: 600px) 100vw, 50vw">
  <img 
    srcset="img-320w.jpg 320w, img-640w.jpg 640w" 
    sizes="(max-width: 600px) 100vw, 50vw"
    alt="Example image">
</picture>

Video Lazy Loading Optimization

Implement segmented video loading, initially loading only metadata:

<video preload="metadata" poster="placeholder.jpg">
  <source src="video.mp4#t=0.1" type="video/mp4">
</video>

Rendering Performance Deep Optimization

Layered Rendering Technology

Chunk rendering for long articles using Intersection Observer API:

const observer = new IntersectionObserver((entries) => {
  entries.forEach(entry => {
    if (entry.isIntersecting) {
      entry.target.innerHTML = fetchContent(entry.target.dataset.id)
      observer.unobserve(entry.target)
    }
  })
}, {rootMargin: '200px'})

document.querySelectorAll('.article-chunk').forEach(chunk => {
  observer.observe(chunk)
})

Scroll Performance Optimization

Add will-change hints to fixed elements:

.sticky-header {
  position: sticky;
  top: 0;
  will-change: transform;
  backface-visibility: hidden;
}

Data Fetching and Caching

Edge Caching Strategy

Implement network-first content caching in Service Worker:

self.addEventListener('fetch', (event) => {
  event.respondWith(
    fetch(event.request)
      .then(networkResponse => {
        caches.open('content-cache')
          .then(cache => cache.put(event.request, networkResponse.clone()))
        return networkResponse
      })
      .catch(() => caches.match(event.request))
  )
})

Data Chunk Loading

Stream loading for article comments:

function loadCommentsInChunks(postId, chunkSize = 10) {
  let loaded = 0
  const loadNextChunk = () => {
    fetch(`/comments?post=${postId}&offset=${loaded}&limit=${chunkSize}`)
      .then(res => res.json())
      .then(comments => {
        renderComments(comments)
        loaded += comments.length
        if (comments.length === chunkSize) {
          requestIdleCallback(loadNextChunk)
        }
      })
  }
  loadNextChunk()
}

Runtime Performance Monitoring

Key Metrics Collection

Capture LCP changes using PerformanceObserver:

const observer = new PerformanceObserver((list) => {
  const entries = list.getEntries()
  const lcpEntry = entries.find(e => e.entryType === 'largest-contentful-paint')
  if (lcpEntry) {
    analytics.send('LCP', lcpEntry.startTime)
  }
})
observer.observe({type: 'largest-contentful-paint', buffered: true})

Memory Leak Detection

Periodic memory usage checks:

setInterval(() => {
  const memory = performance.memory
  if (memory.usedJSHeapSize / memory.totalJSHeapSize > 0.9) {
    console.warn('Memory pressure detected')
  }
}, 30000)

Build Toolchain Optimization

Compile-Time Preprocessing

Configure modern syntax transpilation in webpack:

module.exports = {
  module: {
    rules: [{
      test: /\.js$/,
      exclude: /node_modules/,
      use: {
        loader: 'babel-loader',
        options: {
          presets: [
            ['@babel/preset-env', { 
              targets: '>0.25%, not dead',
              useBuiltIns: 'usage',
              corejs: 3 
            }]
          ]
        }
      }
    }]
  }
}

Artifact Analysis Configuration

Generate build artifact visualization reports:

const BundleAnalyzerPlugin = require('webpack-bundle-analyzer').BundleAnalyzerPlugin

module.exports = {
  plugins: [
    new BundleAnalyzerPlugin({
      analyzerMode: 'static',
      reportFilename: 'bundle-analysis.html'
    })
  ]
}

Server-Side Optimization Measures

Edge Computing Rendering

Implement partial content pre-rendering in Cloudflare Workers:

addEventListener('fetch', event => {
  event.respondWith(handleRequest(event.request))
}

async function handleRequest(request) {
  const response = await fetch(request)
  const html = await response.text()
  const processedHtml = html.replace(
    '<!--SSR_PLACEHOLDER-->', 
    await generateRecommendedPosts()
  )
  return new Response(processedHtml, response)
}

Intelligent Compression Strategy

Select compression algorithm based on client support:

server {
  gzip on;
  gzip_vary on;
  gzip_proxied any;
  gzip_comp_level 6;
  gzip_types text/plain text/css application/json application/javascript text/xml application/xml image/svg+xml;
  brotli on;
  brotli_types text/plain text/css application/json application/javascript text/xml application/xml image/svg+xml;
}

User Interaction Optimization

Click Target Preloading

Predict user behavior to prepare resources in advance:

document.addEventListener('mousedown', (e) => {
  if (e.target.closest('[data-prefetch]')) {
    const module = e.target.closest('[data-prefetch]').dataset.prefetch
    import(`./${module}.js`)
  }
})

Dynamic Skeleton Screen Adaptation

Generate matching skeleton screens based on content structure:

function generateSkeleton(element) {
  const rect = element.getBoundingClientRect()
  const skeleton = document.createElement('div')
  skeleton.className = 'skeleton'
  skeleton.style.width = `${rect.width}px`
  skeleton.style.height = `${rect.height}px`
  return skeleton
}