From @DavidBabel on March 13, 2017 10:1

• VSCode Version: 1.10.2
• OS Version:

Steps to Reproduce:
linked to #22372

1. Close vscode
2. create jsconfig.json file in your $HOME directory with content :

{
    "compilerOptions": {
        "lib": [
            "es2015"
        ]
    }
}

3. launch any project of vscode and check your processor activity :
   

You will got huge performances problems identified, intellisense will completely crash in "loading ..." state, and the whole computer will slow down.

Processes stay as ghost even if vscode is closed.

Copied from original issue: microsoft/vscode#22515