小程序冷启动，热启动时间

验收的时候要看冷启动，热启动时间，豆包给的答案，先记录一下，不确定生效不生效，这个是兼容低版本库的，在为程序后台查看数据

App({
  onLaunch() {
    this.globalData.isColdStart = true
    this.globalData.startTs = Date.now()
    this.globalData.enableHighPrecision = false
    this.globalData.perfInstance = null

    if (wx.canIUse('getPerformance')) {
      const perf = wx.getPerformance()
      if (typeof perf.mark === 'function') {
        perf.mark('boot_start')
        this.globalData.perfInstance = perf
        this.globalData.enableHighPrecision = true
      }
    }

    // 这里放你原本所有onLaunch业务代码
  },
  onShow() {
    // 这里放你原本所有onShow业务代码

    let costMs = 0
    if (this.globalData.enableHighPrecision && this.globalData.perfInstance) {
      const perf = this.globalData.perfInstance
      perf.mark('boot_end')
      perf.measure('boot_total_cost', 'boot_start', 'boot_end')
      const entryList = perf.getEntriesByName('boot_total_cost')
      costMs = Math.round(entryList[0].duration)
    } else {
      costMs = Date.now() - this.globalData.startTs
    }

    if (wx.canIUse('reportPerformance')) {
      const metricId = this.globalData.isColdStart ? 1001 : 1002
      wx.reportPerformance(metricId, costMs)
    }

    this.globalData.isColdStart = false
  },
  globalData: {
    isColdStart: false,
    startTs: 0,
    enableHighPrecision: false,
    perfInstance: null
  }
})

这个是最开始的版本，但是版本库不一样，会报错TypeError: perf.mark is not a function

App({
  onLaunch() {
    // 1. 先打计时起点（最顶部）
    this.globalData.isColdStart = true;
    const perf = wx.getPerformance();
    perf.mark('boot_start');
    this.globalData.perfInstance = perf;

    // 2. 你的原有业务逻辑
    console.log('执行登录、全局初始化');
  },

  onShow() {
    // 1. 先执行你所有onShow业务代码
    console.log('刷新数据、页面更新逻辑');

    // 2. 全部执行完，最后上报性能耗时（最底部）
    const perf = this.globalData.perfInstance;
    if (!perf) return;
    perf.mark('boot_end');
    perf.measure('boot_total_time', 'boot_start', 'boot_end');
    const measureList = perf.getEntriesByName('boot_total_time');
    const costTime = Math.round(measureList[0].duration);
    wx.reportPerformance(this.globalData.isColdStart ? 1001 : 1002, costTime);
    this.globalData.isColdStart = false;
  },

  globalData: {
    isColdStart: false,
    perfInstance: null
  }
})