Javascript 当使用XMLHttpRequest时，Electronjs将我的ping加倍

我正在使用Electron创建一个桌面软件。我从VPS向binance API发送了一个请求，它有320毫秒的ping。但是，当我在Electron的开发环境中发送请求时，ping加倍高达700毫秒。有人能帮我解决这个问题吗？我不知道问题出在Electron或Nodejs方面，还是因为Electron的开发环境和软件发布后，一切都会好起来？为了计算ping，我使用以下方法：

// defining a timer
class Timer {
    constructor () {
        this.isRunning = false;
        this.startTime = 0;
        this.overallTime = 0;
      }

_getTimeElapsedSinceLastStart () {
    if (!this.startTime) {
      return 0;
    }

    return Date.now() - this.startTime;
  }

  start () {
    if (this.isRunning) {
      return console.error('Timer is already running');
    }

    this.isRunning = true;

    this.startTime = Date.now();
  }

  stop () {
    if (!this.isRunning) {
      return console.error('Timer is already stopped');
    }

    this.isRunning = false;

    this.overallTime = this.overallTime + this._getTimeElapsedSinceLastStart();
  }

  reset () {
    this.overallTime = 0;

    if (this.isRunning) {
      this.startTime = Date.now();
      return;
    }

    this.startTime = 0;
  }

  getTime () {
    if (!this.startTime) {
      return 0;
    }

    if (this.isRunning) {
      return this.overallTime + this._getTimeElapsedSinceLastStart();
    }

    return this.overallTime;
  }
}
//get an instant of timer
const timer = new Timer();
timer.reset();
//send request to api
var burl = 'https://api.binance.com';
var endPoint = '/api/v3/ping';
var ourRequest = new XMLHttpRequest();
ourRequest.open('GET',burl+endPoint,true);
ourRequest.onload = function(){
  timer.stop();
  console.log('ping: '+timer.getTime()+' ms')
}

timer.start();
ourRequest.send();