Honestly, vscode opens in a split second for me, faster than I can react and start typing. For all intents and purposes it is instantaneous. Granted my setup is extremely clean and I only have the barest extensions installed for my workflow. The performance is consistent in my Windows, macOS and Linux machines.

I can’t imagine it running slow at all (perhaps someone with hundreds or thousands of extensions would). The last two editors I could recall that took the whole of eternity in the time space continuum to load were Eclipse and Atom. And those were slowass right out of the gate with zero extensions or plugins.