So what?

There are javascript editors that don't use as much memory as atom. What you're saying is irrelevant.

So if this is hard to understand, the conclusion, in simple words:

the memory consumption for a javascript editor will be a magnitude bigger than native.

In my example 66Mb Sublime vs 620MB VS Code (no plugins)

halokonrad isn't talking about sublime. He's talking about Atom vs VS Code.