2.0 KiB
2.0 KiB
性能优化模式
Vue 3 前端优化
<!-- 1. v-memo — 防止不必要的重渲染 -->
<template>
<div v-memo="[item.id, item.name]">
{{ item.name }}
</div>
</template>
<!-- 2. computed — 缓存计算结果 -->
<script setup>
const sorted = computed(() => [...items.value].sort(compareFn))
// 3. shallowRef — 大型对象避免深层响应
const heavyData = shallowRef(null)
// 4. 异步组件 — 代码分割
const HeavyChart = defineAsyncComponent(() => import('./HeavyChart.vue'))
// 5. 虚拟化 — 大列表
import { useVirtualizer } from '@tanstack/vue-virtual'
// 6. keep-alive — 页面缓存
// <keep-alive :include="cachedViews"><router-view /></keep-alive>
</script>
Vite 构建优化
// vite.config.ts
export default defineConfig({
build: {
target: 'es2015',
minify: 'terser',
terserOptions: {
compress: { drop_console: true, drop_debugger: true },
},
rollupOptions: {
output: {
manualChunks: {
'vue-vendor': ['vue', 'vue-router', 'pinia'],
// 仅管理端:'element-plus': ['element-plus'],
'echarts': ['echarts'],
},
},
},
},
})
Hyperf 后端优化
// 1. 协程并发 — 并行无依赖 I/O
$parallel = new Parallel(10);
$parallel->add(fn() => $this->orderService->getStatistics($id));
$parallel->add(fn() => $this->paymentService->getPayments($id));
[$stats, $payments] = $parallel->wait();
// 2. 连接池调优
'pool' => [
'min_connections' => 5,
'max_connections' => 50,
'wait_timeout' => 3.0,
],
// 3. 缓存注解
#[Cacheable(prefix: 'user', ttl: 3600)]
public function getById(int $id): ?User { ... }
数据库优化
-- 复合索引:遵循最左前缀原则
CREATE INDEX idx_orders_status_created ON production_orders(status, created_at);
-- 覆盖索引:避免回表
CREATE INDEX idx_orders_cover ON production_orders(status, total_amount, paid_amount);
-- 游标分页(百万级数据)
SELECT * FROM orders WHERE id > ? ORDER BY id ASC LIMIT 20;