• Version: 8.4.0
• Platform: Linux version 3.10.0-514.10.2.el7.x86_64
• Subsystem: CentOS Linux release 7.3.1611 (Core)

My project is using express.js, and having a code fragment like this:

conse {URL} = require('url');
const express = require('express');

const router = express.Router();

router.put('', (req, res) => {
  let data = req.body.flow ? JSON.parse(req.body.flow) : {};
  if (data.url && !data.domain) {
    data.domain = new URL(data.url).hostname;
  }

  res.send();
})

When many request come in, the project memory will rise slowly ,and sometimes it will drop a little. but in general it's still up. When i change to url.parse(), the memory looks normal. I use PM2 to look memory.

What's the difference between the two(new URL and url.parse) in memory or gc?