Extension causes high cpu load

[chuzksy-codeactive]

• Issue Type: Performance
• Extension Name: vscode-jest
• Extension Version: 2.9.2
• OS Version: Darwin x64 18.2.0
• VSCode version: 1.32.1

⚠️ Make sure to attach this file from your home-directory: /Users/onuchukwuchika/Orta.vscode-jest-unresponsive.cpuprofile.txt ⚠️

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

[jmarceli]

I looks similar to the #455