It's not the GUI itself. A console application in a window is still a gui rendering console text. It's the fact that Vscode and jetbrains use a high level langu

It's not the GUI itself. A console application in a window is still a gui rendering console text. It's the fact that Vscode and jetbrains use a high level language/engine that makes it slow. For jetbrains it's java and for vscode it's an html rendering engine. An IDE built from vulkan or some other low level graphics API can likely be even faster then vim depending on the console it's running within.