Edit: vscode != visual studio. I’ll leave my comment.
EDIT: I'd also hardly call VSCode "performant", either, at least compared to the multitudes of editors that don't pull in a full-on browser engine for basic text rendering... but yes, it is indeed "performant" relative to Visual Studio.
I used to have that issue 5 years ago but since then it opens under 5 seconds and loads the solutions I need for not much more. Currently using it on a cheapish recent windows laptop but even on a 8gb x220 it works fine, just loads for 30 sec in the beginning and then it's smooth.
Granted I'm only opening .net solutions with under 100 projects each but anything above that is unnecessarily more difficult to navigate with just vim.
And in my experience VSCode is many times slower than Visual Studio on the same projects. None of them are as fast as barebones sublime or vim on an m1 mac but when I load the latter with plugins it's not a huge difference.