Extension causes high cpu load

- Issue Type: `Performance`
- Extension Name: `search`
- Extension Version: `1.0.37`
- OS Version: `Linux x64 5.4.0-58-generic`
- VSCode version: `1.52.1`

:warning: Make sure to **attach** this file from your *home*-directory:
:warning:`/tmp/Wscats.search-unresponsive.cpuprofile.txt`

Find more details here: https://github.com/microsoft/vscode/wiki/Explain-extension-causes-high-cpu-load