[Pxl_Buzzard]

There are a lot of factors that play into the speed (perceived and real) of an editor. Sublime is written in C, which is generally recognized as a performant language when used correctly. In contrast, Atom and VS Code are Electron[1] apps, which mean they have to deal with browser optimization. They both use a lot of tricks[2] to operate as quickly as they do. And in all editors, one bad extension can kill performance, from my recent experience Resharper in Visual Studio increases startup time by 3x.

An editor is not as simple as displaying lines of text a la Notepad, different editors optimize for different use cases.

1. https://electron.atom.io/

2. http://blog.atom.io/2017/06/22/a-new-approach-to-text-render...

[saagarjha]

Sublime Text is written is C++ FYI.