Extension causes high cpu load

[arieaditya]

• Issue Type: Performance
• Extension Name: language-stylus
• Extension Version: 1.11.0
• OS Version: Darwin x64 18.2.0
• VSCode version: 1.30.2

:warning: Make sure to attach this file from your home-directory: /Users/arieaditya/sysoev.language-stylus-unresponsive.cpuprofile.txt :warning:

Find more details here: https://github.com/Microsoft/vscode/wiki/Explain:-extension-causes-high-cpu-load

[iChenLei]

Duplicated #71