What kind of codebases do you work with? Other than with multi-MB files or thousands of multi-cursors, I've never had any performance issues with VS-Code. It's actually one of the fastest Electron apps, I would say. If I notice a delay, it's usually the language server or some support package's background command taking a bit of time.
If all you know is VS Code it probably feels fine and you should definitely not try Zed - "one of the fastest Electron apps" isn't exactly a ringing endorsement.
I have used both unbearably slow IDEs like Visual Studio, Android Studio, Atmel Studio and very fast and lightweight editors like Notepad++ and Sublime Text.
I don't have any issue with the speed of VS-Code on my machine and it feels the same as Sublime Text used to.
