Node.js 为什么我的heroku应用程序在使用gzip压缩后加载资源的时间太长？

我在Heroku有一个MEAN stack应用程序。在我的Express服务器中，我使用gzip（通过压缩中间件）

问题是Angular main.js文件（最初是3.2mb，压缩到575kb）似乎仍在下载，就好像它仍然是未压缩的大小一样。以下是加载时间的图像：

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我知道我的网络连接很好（大约20mbps）。我有什么遗漏吗？我的gzip实现中有什么错误吗？甚至我的Heroku dyno？此应用程序当前位于hobby dyno上。我确实把它改成了专业版，但没有注意到任何区别。

我不确定你的环境是什么，但你可以试试这个，它对我来说是完全实用的

// Get dependencies
const express = require('express');
const path = require('path');
const http = require('http');
const bodyParser = require('body-parser');
const compression = require('compression');

const runApp = async() => {
  const app = express();
   app.use(compression({
      filter: function (req, res) {
        return (/json|text|javascript|css|font|svg/).test(res.getHeader('Content-Type'));
      },
      level: 9
  }));
  app.use(bodyParser.json());
  app.use(bodyParser.urlencoded({ extended: false }));
  app.use(express.static(path.join(__dirname, 'public')));



  app.get('*', (req, res) => {
    console.log('Front end called');
    res.sendFile(path.join(__dirname, 'public/index.html'));
  });

  /**
   * Get port from environment and store in Express.
   */
  const port = process.env.PORT || '8081';
  app.set('port', port);

  /**
   * Create HTTP server.
   */
  const server = http.createServer(app);

  /**
   * Listen on provided port, on all network interfaces.
   */
  server.listen(port, () => console.log(`API running on localhost:${port}`));
};
runApp();

// Get dependencies
const express = require('express');
const path = require('path');
const http = require('http');
const bodyParser = require('body-parser');
const compression = require('compression');

const runApp = async() => {
  const app = express();
   app.use(compression({
      filter: function (req, res) {
        return (/json|text|javascript|css|font|svg/).test(res.getHeader('Content-Type'));
      },
      level: 9
  }));
  app.use(bodyParser.json());
  app.use(bodyParser.urlencoded({ extended: false }));
  app.use(express.static(path.join(__dirname, 'public')));



  app.get('*', (req, res) => {
    console.log('Front end called');
    res.sendFile(path.join(__dirname, 'public/index.html'));
  });

  /**
   * Get port from environment and store in Express.
   */
  const port = process.env.PORT || '8081';
  app.set('port', port);

  /**
   * Create HTTP server.
   */
  const server = http.createServer(app);

  /**
   * Listen on provided port, on all network interfaces.
   */
  server.listen(port, () => console.log(`API running on localhost:${port}`));
};
runApp();