Extension causes high cpu load

[baardhermansen]

blackmist.LinkCheckMD-unresponsive.cpuprofile.txt

• Issue Type: Performance
• Extension Name: LinkCheckMD
• Extension Version: 0.3.1
• OS Version: Windows_NT x64 10.0.19041
• VSCode version: 1.42.0

:warning: Make sure to attach this file from your home-directory: :warning:C:\Users\caveb\blackmist.LinkCheckMD-unresponsive.cpuprofile.txt blackmist.LinkCheckMD-unresponsive.cpuprofile.txt

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