{"id":102537,"date":"2026-09-09T06:41:13","date_gmt":"2026-09-08T22:41:13","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/102537.html"},"modified":"2026-09-09T06:41:13","modified_gmt":"2026-09-08T22:41:13","slug":"python%e6%b5%8f%e8%a7%88%e5%99%a8%e5%8a%a0%e9%80%9f%e5%99%a8","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/102537.html","title":{"rendered":"Python\u6d4f\u89c8\u5668\u52a0\u901f\u5668"},"content":{"rendered":"

\u52a0\u901f\u5668\u6982\u5ff5：<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u6d4f\u89c8\u5668\u52a0\u901f\u5668\u901a\u5e38\u6307：<\/p>\n

\u00a0<\/p>\n

\u00b7 \u7f51\u7edc\u8bf7\u6c42\u52a0\u901f（\u9884\u8fde\u63a5\u3001\u9884\u52a0\u8f7d）<\/p>\n

\u00b7 \u8d44\u6e90\u52a0\u8f7d\u4f18\u5316（\u61d2\u52a0\u8f7d\u3001\u7f13\u5b58）<\/p>\n

\u00b7 \u6e32\u67d3\u6027\u80fd\u4f18\u5316（\u52a8\u753b\u5e27\u3001\u957f\u4efb\u52a1\u5206\u7247）<\/p>\n

\u00a0<\/p>\n

\u4e0b\u9762\u662f\u524d\u7aef\u201c\u7f51\u7edc\u4e0e\u6e32\u67d3\u52a0\u901f\u5668\u201d\u7684\u793a\u4f8b，\u6db5\u76d6\u6700\u6838\u5fc3\u7684\u51e0\u79cd\u52a0\u901f\u624b\u6bb5：<\/p>\n

\u00a0<\/p>\n

—<\/p>\n

\u00a0<\/p>\n

```html<\/p>\n

<!DOCTYPE html><\/p>\n

<html lang="zh-CN"><\/p>\n

<head><\/p>\n

\u00a0 <meta charset="UTF-8" \/><\/p>\n

\u00a0 <meta name="viewport" content="width=device-width, initial-scale=1.0" \/><\/p>\n

\u00a0 <title>\u6d4f\u89c8\u5668\u52a0\u901f\u5668\u6838\u5fc3\u539f\u7406<\/title><\/p>\n

<\/head><\/p>\n

<body><\/p>\n

\u00a0<\/p>\n

\u00a0 <h1>🚀 \u6d4f\u89c8\u5668\u52a0\u901f\u5668 Demo<\/h1><\/p>\n

\u00a0 <button id="loadBtn">\u52a0\u8f7d\u6d4b\u8bd5\u56fe\u7247<\/button><\/p>\n

\u00a0 <div id="imgContainer"><\/div><\/p>\n

\u00a0 <div id="log"><\/div><\/p>\n

\u00a0<\/p>\n

\u00a0 <script><\/p>\n

\u00a0 \u00a0 \/\/ ============================================================<\/p>\n

\u00a0 \u00a0 \/\/ 1. DNS \u9884\u89e3\u6790 + \u9884\u8fde\u63a5 (\u63d0\u524d\u5efa\u7acb\u7f51\u7edc\u94fe\u8def)<\/p>\n

\u00a0 \u00a0 \/\/ ============================================================<\/p>\n

\u00a0 \u00a0 function preConnect(url) {<\/p>\n

\u00a0 \u00a0 \u00a0 const link = document.createElement('link');<\/p>\n

\u00a0 \u00a0 \u00a0 link.rel = 'preconnect';<\/p>\n

\u00a0 \u00a0 \u00a0 link.href = url;<\/p>\n

\u00a0 \u00a0 \u00a0 document.head.appendChild(link);<\/p>\n

\u00a0 \u00a0 \u00a0\u00a0<\/p>\n

\u00a0 \u00a0 \u00a0 \/\/ \u540c\u65f6\u505a DNS \u9884\u89e3\u6790 (\u517c\u5bb9\u8001\u6d4f\u89c8\u5668)<\/p>\n

\u00a0 \u00a0 \u00a0 const dnsLink = document.createElement('link');<\/p>\n

\u00a0 \u00a0 \u00a0 dnsLink.rel = 'dns-prefetch';<\/p>\n

\u00a0 \u00a0 \u00a0 dnsLink.href = url;<\/p>\n

\u00a0 \u00a0 \u00a0 document.head.appendChild(dnsLink);<\/p>\n

\u00a0 \u00a0 \u00a0\u00a0<\/p>\n

\u00a0 \u00a0 \u00a0 log(`\u2705 \u9884\u8fde\u63a5\u5230 ${url}`);<\/p>\n

\u00a0 \u00a0 }<\/p>\n

\u00a0<\/p>\n

\u00a0 \u00a0 \/\/ ============================================================<\/p>\n

\u00a0 \u00a0 \/\/ 2. \u9884\u52a0\u8f7d\u5173\u952e\u8d44\u6e90 (\u4f18\u5148\u52a0\u8f7d，\u4e0d\u963b\u585e\u6e32\u67d3)<\/p>\n

\u00a0 \u00a0 \/\/ ============================================================<\/p>\n

\u00a0 \u00a0 function preloadResource(url, asType = 'image') {<\/p>\n

\u00a0 \u00a0 \u00a0 const link = document.createElement('link');<\/p>\n

\u00a0 \u00a0 \u00a0 link.rel = 'preload';<\/p>\n

\u00a0 \u00a0 \u00a0 link.href = url;<\/p>\n

\u00a0 \u00a0 \u00a0 link.as = asType;<\/p>\n

\u00a0 \u00a0 \u00a0 document.head.appendChild(link);<\/p>\n

\u00a0 \u00a0 \u00a0 log(`📦 \u9884\u52a0\u8f7d\u8d44\u6e90: ${url}`);<\/p>\n

\u00a0 \u00a0 }<\/p>\n

\u00a0<\/p>\n

\u00a0 \u00a0 \/\/ ============================================================<\/p>\n

\u00a0 \u00a0 \/\/ 3. \u61d2\u52a0\u8f7d + \u6e10\u8fdb\u5f0f\u56fe\u7247\u89e3\u7801 (\u975e\u5173\u952e\u8d44\u6e90\u5ef6\u540e)<\/p>\n

\u00a0 \u00a0 \/\/ ============================================================<\/p>\n

\u00a0 \u00a0 function lazyLoadImage(url, container) {<\/p>\n

\u00a0 \u00a0 \u00a0 const img = new Image();<\/p>\n

\u00a0 \u00a0 \u00a0 img.loading = 'lazy'; \/\/ \u6d4f\u89c8\u5668\u539f\u751f\u61d2\u52a0\u8f7d<\/p>\n

\u00a0 \u00a0 \u00a0 img.decoding = 'async'; \/\/ \u5f02\u6b65\u89e3\u7801，\u4e0d\u963b\u585e\u4e3b\u7ebf\u7a0b<\/p>\n

\u00a0 \u00a0 \u00a0 img.src = url;<\/p>\n

\u00a0 \u00a0 \u00a0 img.alt = 'lazy image';<\/p>\n

\u00a0 \u00a0 \u00a0 container.appendChild(img);<\/p>\n

\u00a0 \u00a0 \u00a0 log(`🖼\ufe0f \u61d2\u52a0\u8f7d\u56fe\u7247: ${url}`);<\/p>\n

\u00a0 \u00a0 }<\/p>\n

\u00a0<\/p>\n

\u00a0 \u00a0 \/\/ ============================================================<\/p>\n

\u00a0 \u00a0 \/\/ 4. \u4f7f\u7528 requestIdleCallback \u6267\u884c\u4f4e\u4f18\u5148\u7ea7\u4efb\u52a1<\/p>\n

\u00a0 \u00a0 \/\/ ============================================================<\/p>\n

\u00a0 \u00a0 function runWhenIdle(fn) {<\/p>\n

\u00a0 \u00a0 \u00a0 if ('requestIdleCallback' in window) {<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 requestIdleCallback(fn, { timeout: 2000 });<\/p>\n

\u00a0 \u00a0 \u00a0 } else {<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \/\/ \u964d\u7ea7\u65b9\u6848：\u7528 setTimeout \u5ef6\u8fdf\u6267\u884c<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 setTimeout(fn, 100);<\/p>\n

\u00a0 \u00a0 \u00a0 }<\/p>\n

\u00a0 \u00a0 \u00a0 log(`\u23f3 \u4efb\u52a1\u5df2\u653e\u5230\u7a7a\u95f2\u65f6\u6267\u884c`);<\/p>\n

\u00a0 \u00a0 }<\/p>\n

\u00a0<\/p>\n

\u00a0 \u00a0 \/\/ ============================================================<\/p>\n

\u00a0 \u00a0 \/\/ 5. \u957f\u4efb\u52a1\u5206\u7247 (Time Slicing) \u2014 \u907f\u514d\u5361\u987f<\/p>\n

\u00a0 \u00a0 \/\/ ============================================================<\/p>\n

\u00a0 \u00a0 function timeSliceTask(dataArray, processFn, chunkSize = 50) {<\/p>\n

\u00a0 \u00a0 \u00a0 let index = 0;<\/p>\n

\u00a0 \u00a0 \u00a0 const total = dataArray.length;<\/p>\n

\u00a0<\/p>\n

\u00a0 \u00a0 \u00a0 function nextChunk() {<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 const end = Math.min(index + chunkSize, total);<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 for (let i = index; i < end; i++) {<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 processFn(dataArray[i], i);<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 }<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 index = end;<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 if (index < total) {<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 requestAnimationFrame(nextChunk); \/\/ \u6bcf\u5e27\u53ea\u5904\u7406\u4e00\u5c0f\u6279<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 } else {<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 log(`\u2705 \u957f\u4efb\u52a1\u5206\u7247\u5b8c\u6210，\u5171\u5904\u7406 ${total} \u9879`);<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 }<\/p>\n

\u00a0 \u00a0 \u00a0 }<\/p>\n

\u00a0 \u00a0 \u00a0 requestAnimationFrame(nextChunk);<\/p>\n

\u00a0 \u00a0 }<\/p>\n

\u00a0<\/p>\n

\u00a0 \u00a0 \/\/ ============================================================<\/p>\n

\u00a0 \u00a0 \/\/ \u65e5\u5fd7\u8f85\u52a9<\/p>\n

\u00a0 \u00a0 \/\/ ============================================================<\/p>\n

\u00a0 \u00a0 function log(msg) {<\/p>\n

\u00a0 \u00a0 \u00a0 const logDiv = document.getElementById('log');<\/p>\n

\u00a0 \u00a0 \u00a0 const p = document.createElement('p');<\/p>\n

\u00a0 \u00a0 \u00a0 p.textContent = `[${new Date().toLocaleTimeString()}] ${msg}`;<\/p>\n

\u00a0 \u00a0 \u00a0 logDiv.appendChild(p);<\/p>\n

\u00a0 \u00a0 \u00a0 console.log(msg);<\/p>\n

\u00a0 \u00a0 }<\/p>\n

\u00a0<\/p>\n

\u00a0 \u00a0 \/\/ ============================================================<\/p>\n

\u00a0 \u00a0 \/\/ \u6f14\u793a\u6309\u94ae\u4ea4\u4e92<\/p>\n

\u00a0 \u00a0 \/\/ ============================================================<\/p>\n

\u00a0 \u00a0 document.getElementById('loadBtn').addEventListener('click', () => {<\/p>\n

\u00a0 \u00a0 \u00a0 const container = document.getElementById('imgContainer');<\/p>\n

\u00a0 \u00a0 \u00a0 container.innerHTML = ''; \/\/ \u6e05\u7a7a<\/p>\n

\u00a0 \u00a0 \u00a0 document.getElementById('log').innerHTML = ''; \/\/ \u6e05\u7a7a\u65e5\u5fd7<\/p>\n

\u00a0<\/p>\n

\u00a0 \u00a0 \u00a0 const imgUrl = 'https:\/\/picsum.photos\/600\/400?random=' + Date.now();<\/p>\n

\u00a0<\/p>\n

\u00a0 \u00a0 \u00a0 \/\/ \u7b2c\u4e00\u6b65：\u9884\u8fde\u63a5\u56fe\u7247 CDN \u57df\u540d<\/p>\n

\u00a0 \u00a0 \u00a0 preConnect('https:\/\/picsum.photos');<\/p>\n

\u00a0<\/p>\n

\u00a0 \u00a0 \u00a0 \/\/ \u7b2c\u4e8c\u6b65：\u9884\u52a0\u8f7d\u56fe\u7247<\/p>\n

\u00a0 \u00a0 \u00a0 preloadResource(imgUrl, 'image');<\/p>\n

\u00a0<\/p>\n

\u00a0 \u00a0 \u00a0 \/\/ \u7b2c\u4e09\u6b65：\u7528\u61d2\u52a0\u8f7d\u65b9\u5f0f\u5c55\u793a\u56fe\u7247 (\u975e\u963b\u585e)<\/p>\n

\u00a0 \u00a0 \u00a0 lazyLoadImage(imgUrl, container);<\/p>\n

\u00a0<\/p>\n

\u00a0 \u00a0 \u00a0 \/\/ \u7b2c\u56db\u6b65：\u6a21\u62df\u957f\u4efb\u52a1\u5206\u7247 \u2014\u2014 \u5904\u7406\u5927\u91cf\u6570\u636e(\u4f8b\u5982\u751f\u62101000\u4e2a\u5360\u4f4d\u5143\u7d20)<\/p>\n

\u00a0 \u00a0 \u00a0 const bigData = new Array(1000).fill(0).map((_, i) => i);<\/p>\n

\u00a0 \u00a0 \u00a0 timeSliceTask(bigData, (val, idx) => {<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \/\/ \u6a21\u62df\u8f7b\u91cf\u5904\u7406，\u4f8b\u5982\u5728console\u8f93\u51fa\u6216\u66f4\u65b0\u67d0\u4e2a\u72b6\u6001<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \/\/ \u8fd9\u91cc\u53ea\u505a\u6f14\u793a，\u4e0d\u5b9e\u9645DOM\u64cd\u4f5c\u4ee5\u514d\u5e72\u6270\u6027\u80fd\u6d4b\u8bd5<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 if (idx % 100 === 0) {<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 log(`\u23f3 \u5df2\u5904\u7406 ${idx} \u9879…`);<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 }<\/p>\n

\u00a0 \u00a0 \u00a0 });<\/p>\n

\u00a0<\/p>\n

\u00a0 \u00a0 \u00a0 \/\/ \u7b2c\u4e94\u6b65：\u628a\u4e00\u4e9b\u975e\u7d27\u6025\u7edf\u8ba1\u4efb\u52a1\u653e\u5230\u7a7a\u95f2\u65f6\u6267\u884c<\/p>\n

\u00a0 \u00a0 \u00a0 runWhenIdle(() => {<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 log(`📊 \u7a7a\u95f2\u65f6\u6267\u884c\u7edf\u8ba1: \u56fe\u7247\u52a0\u8f7d\u8017\u65f6\u7b49 (\u6a21\u62df)`);<\/p>\n

\u00a0 \u00a0 \u00a0 });<\/p>\n

\u00a0 \u00a0 });<\/p>\n

\u00a0<\/p>\n

\u00a0 \u00a0 \/\/ \u9875\u9762\u52a0\u8f7d\u5b8c\u6bd5\u540e\u81ea\u52a8\u6267\u884c\u4e00\u6b21\u6f14\u793a<\/p>\n

\u00a0 \u00a0 window.addEventListener('load', () => {<\/p>\n

\u00a0 \u00a0 \u00a0 log('🚀 \u52a0\u901f\u5668\u5df2\u5c31\u7eea，\u70b9\u51fb\u6309\u94ae\u4f53\u9a8c');<\/p>\n

\u00a0 \u00a0 });<\/p>\n

\u00a0 <\/script><\/p>\n

\u00a0<\/p>\n

\u00a0 <style><\/p>\n

\u00a0 \u00a0 body { font-family: system-ui; padding: 20px; max-width: 800px; margin: 0 auto; }<\/p>\n

\u00a0 \u00a0 #log { background: #f5f5f5; padding: 12px; border-radius: 8px; max-height: 300px; overflow-y: auto; font-size: 14px; margin-top: 16px; }<\/p>\n

\u00a0 \u00a0 #log p { margin: 4px 0; }<\/p>\n

\u00a0 \u00a0 img { max-width: 100%; border-radius: 8px; margin-top: 12px; }<\/p>\n

\u00a0 \u00a0 button { padding: 10px 24px; font-size: 16px; cursor: pointer; }<\/p>\n

\u00a0 <\/style><\/p>\n

\u00a0<\/p>\n

<\/body><\/p>\n

<\/html><\/p>\n

```<\/p>\n

\u00a0<\/p>\n

\u4ec5\u4f9b\u53c2\u8003<\/p>\n","protected":false},"excerpt":{"rendered":"

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