Web 性能优化：让你的网站快 3 倍的 10 个技巧
Web Performance Optimization — 10 Tips to Make Your Site 3x Faster
| iDev Team | 2026-08-12T01:35:00
网站慢 1 秒，转化率降 7%。这 10 个前后端优化技巧，帮你显著提升页面加载速度和用户体验。
Every 1-second delay costs 7% in conversions. These 10 frontend and backend optimization tips significantly improve page load speed and user experience.
前端优化1. 图片懒加载 + WebP 格式首屏之外的图片用懒加载，所有图片转为 WebP 格式，体积减少 30-50%。2. 代码分割用 Vite/Webpack 的动态 import，按路由拆分 JS 包。用户只下载当前页面需要的代码。3. CDN 加速静态资源（JS/CSS/图片）放到 CDN，用户从最近的节点加载，延迟降低 60%+。4. 预加载关键资源用 <link rel="preload"> 提前加载字体和关键 CSS，减少渲染阻塞。5. 骨架屏数据加载时展示骨架屏而不是白屏，感知速度提升明显。后端优化6. 数据库索引慢查询 90% 的原因是缺少索引。用 EXPLAIN 分析查询，给 WHERE 和 ORDER BY 的字段加索引。7. 接口响应压缩启用 Gzip/Brotli 压缩，API 响应体积减少 70%+。8. 缓存策略高频读、低频写的数据用 Redis 缓存。分类列表、配置信息这些几乎不变的数据，不要每次都查数据库。9. 分页而不是全量列表接口必须分页。返回 10000 条数据给前端，不如分 100 页每页 100 条。10. 连接池优化数据库连接池（HikariCP）配置合理的大小，避免连接不够用或浪费资源。
Frontend Optimization1. Lazy Loading + WebPLazy-load images below the fold, convert all images to WebP format — 30-50% size reduction.2. Code SplittingUse Vite/Webpack dynamic imports to split JS bundles by route. Users only download code needed for the current page.3. CDN AccelerationServe static assets (JS/CSS/images) from CDN. Users load from the nearest node — 60%+ latency reduction.4. Preload Critical ResourcesUse <link rel="preload"> for fonts and critical CSS to reduce render blocking.5. Skeleton ScreensShow skeleton screens during data loading instead of blank pages — perceived speed improves dramatically.Backend Optimization6. Database Indexes90% of slow queries are caused by missing indexes. Use EXPLAIN to analyze queries, add indexes on WHERE and ORDER BY columns.7. Response CompressionEnable Gzip/Brotli compression — 70%+ reduction in API response size.8. Caching StrategyCache high-read, low-write data with Redis. Category lists and configuration data barely change — don't query the database every time.9. Pagination, Not Full LoadsList endpoints must paginate. Returning 10,000 records to the frontend is worse than 100 pages of 100 records each.10. Connection Pool TuningConfigure database connection pool (HikariCP) with reasonable sizes — avoid running out of connections or wasting resources.