Extension causes high cpu load

- Issue Type: `Performance`
- Extension Name: `lua`
- Extension Version: `3.6.4`
- OS Version: `Windows_NT x64 10.0.19041`
- VS Code version: `1.70.0`

:warning: Make sure to **attach** this file from your *home*-directory:
:warning:`file:///c%3A/Users/MHD444/AppData/Local/Temp/sumneko.lua-unresponsive.cpuprofile.txt`

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

Start by checking whether the requested CPU profile is available at c:/Users/MHD444/AppData/Local/Temp/sumneko.lua-unresponsive.cpuprofile.txt, then read the linked VS Code guidance on extension CPU investigations. Use the profile and the reported Lua extension version to identify the responsible language-server work; done means the high-CPU cause is isolated and a reproducible fix or clear follow-up is documented.

Written by the indexing model from the issue text.