Vue.js项目的性能瓶颈分析与解决

// 组件拆分示例
<template>
  <div>
    <HeavyComponent v-if="showHeavyComponent" />
    <LightComponent v-else />
  </div>
</template>

<script>
export default {
  data() {
    return {
      showHeavyComponent: false
    };
  }
};
</script>

// 虚拟滚动示例
<template>
  <RecycleScroller
    class="scroller"
    :items="items"
    :item-size="32"
    key-field="id"
  >
    <template v-slot="{ item }">
      <div class="user">
        {{ item.name }}
      </div>
    </template>
  </RecycleScroller>
</template>

<script>
import { RecycleScroller } from 'vue-virtual-scroller'

export default {
  components: { RecycleScroller },
  data() {
    return {
      items: [
        { id: 1, name: 'User 1' },
        { id: 2, name: 'User 2' },
        // ... 更多数据
      ]
    };
  }
};
</script>

// 优化响应式系统示例
<template>
  <div>
    <p>{{ expensiveComputation }}</p>
  </div>
</template>

<script>
export default {
  data() {
    return {
      a: 1,
      b: 2
    };
  },
  computed: {
    expensiveComputation() {
      // 只有当a或b变化时才重新计算
      return this.a + this.b;
    }
  }
};
</script>

// 懒加载示例
const Home = () => import(/* webpackChunkName: "home" */ './Home.vue')
const About = () => import(/* webpackChunkName: "about" */ './About.vue')

const routes = [
  { path: '/', component: Home },
  { path: '/about', component: About }
]