Vue和ECharts4Taro3进阶指南：如何实现大数据可视化的性能优化

<template>  <div>    <div v-for="item in visibleData" :key="item.id">{{item.value}}</div>    <div ref="scroll" @scroll="loadMoreData"></div>  </div></template><script>export default {  data() {    return {      data: [], // 所有数据      visibleData: [], // 可见数据      pageNum: 1, // 当前页码      pageSize: 10, // 每页显示数量    };  },  mounted() {    this.loadData();  },  methods: {    async loadData() {      const res = await api.fetchData(this.pageNum, this.pageSize); // 请求接口获取数据      this.data = res.data;      this.updateVisibleData();    },    updateVisibleData() {      const start = (this.pageNum - 1) * this.pageSize;      const end = this.pageNum * this.pageSize;      this.visibleData = this.data.slice(start, end);    },    async loadMoreData() {      const { scrollTop, clientHeight, scrollHeight } = this.$refs.scroll;      if (scrollTop + clientHeight >= scrollHeight) {        this.pageNum++;        await this.loadData();      }    },  },};</script>

const processedDataCache = {};function processData(data) {  if (processedDataCache[data]) {    return processedDataCache[data];  }  // 数据处理逻辑  const processedData = /* 进行数据处理 */;  processedDataCache[data] = processedData;  return processedData;}

import MyWorker from 'worker-loader!./my-worker'; // 加载Web Worker文件const worker = new MyWorker();worker.onmessage = (event) => {  console.log('Received message from worker:', event.data);};worker.postMessage('Start calculation'); // 向Web Worker发送消息

const canvas = document.getElementById('myCanvas');const context = canvas.getContext('2d');// 绘制图形context.beginPath();context.moveTo(20, 20);context.lineTo(100, 100);context.stroke();

import { throttle, debounce } from 'lodash';// 节流函数function throttledFn() {  // 处理函数逻辑}const throttled = throttle(throttledFn, 1000); // 控制1秒内只能执行一次// 防抖函数function debouncedFn() {  // 处理函数逻辑}const debounced = debounce(debouncedFn, 1000); // 只有在1秒内没有再次触发时才会执行