Why is there a 2MB limit anyway? Is it because the document is rendered to HTML? In this case, why don't they render only the part currently visible on screen?
They were probably tired of people complaining about problems with this corner case of opening humongous files in an editor meant for editing source code. Atom properly should be optimized for kilobyte sized files, not megabyte.
Atom is essentially a web browser running a text editing web app. Given how much web pages tend to "expand" when loaded into memory in a browser, it's not so surprising.
I'm guessing that Zeus isn't based on a web browser but was designed from the beginning to be an editor.
Zeus, like a lot of text editors is an in memory editor, which basically means it loads the whole file into memory.
So it too is limited by the total memory available to the application.
For a 32 bit Windows application the available memory comes in at around 2 Gigs and for a 64 bit Windows application that explodes to 8 Terra bytes.
So even if Atom was 32 bit it should have 2 Gigs of memory to play with.
I'm not sure why Atom does limit files to 2 megs, but if it is because of the expansion of memory then there must be some serious expanding happening there.
