VSCode is only fast by IDE standards whereas functionality-wise it’s more an extensible text editor. It lags even at the modest task of resizing its own window, where the UI just freezes at its original rectangle and waits until you release the window. No native app I use behaves like this. This is even before mentioning the innumerate pop-up <div>s that all have different, inconsistent styling. As an application it’s absolutely alien on the system.