title: node_modules slow down the VS 2017 IDE
body: <p>I am working on an angular 2 project, and it is created by angular/CLI. After I opened my project by 'open -> folders,' the CPU usage been boosted to over 50% and everything becomes very slow. I tested it that the slowdown issue caused by 'node_moduls'. After I removed this folder, the IDE will back to normal.</p>
  
  <p>However, in the project, I still need the 'node_moduls' folder, because I got error message everywhere if I removed the 'node_moduls' folder! Even an import from the angular core!</p>
  
  <p><code>
  import { Component, OnInit, ViewChild, Input, Output, EventEmitter } from '@angular/core';)
  </code></p>
  
  <p>Is any way to fix this problem?</p>
  
  <p>As I can see, VS 2017 keep scanning my folders and files, and this process has been taken for 3 hours. Now the IDE still takes 30% usage of the CPU usage. I think it needs to port the VS code's folders management idea to VS 2017.
  <a href="https://i.stack.imgur.com/wQv5x.jpg" rel="noreferrer"><img src="https://i.stack.imgur.com/wQv5x.jpg" alt="enter image description here"></a></p>
  
  <p>And I have checked the "exclude" option that should show on the right-click menu. However, it does not have any option for excluding the folder.</p>
  
  <p><a href="https://i.stack.imgur.com/4Bq0U.png" rel="noreferrer"><img src="https://i.stack.imgur.com/4Bq0U.png" alt="enter image description here"></a></p>
  
  <p>update: It has been a night, (I kept the VS2017 open) the VS still taking 30-40% CPU usage, and the scanning data still on 45% same with the first image. </p>