[JoyrexJ9]

VSCode extension are written in Typescript but most of them rely on a language server for things like refactoring, type hints, code completion etc. These language servers run as native process (written in Go, C# etc), so are (roughly) as fast as your machine is.

If these operations take over a second it may be an issue with your machine or install of VS Code

[rightbyte]

The C++ extensions refuse to work in big projects for me. It grinds to a halt and I have found no way to limit its search path.

The major silly thing with VS Code is that it has no support for floating windows.