[crazygringo]

I dunno why you haven't encountered it, but it's a real thing.

I remember using one editor perhaps 8 years ago, and if I tried multi-cursor mode with more than ~40 insertion points (totally reasonable to edit 40 similar lines at a time), it took a couple of seconds to register each keypress.

Similarly, other editors wind up choking on syntax highlighting, or large files, or find & replace, or documentation lookup, or whatever.

The "mysterious difficulty" you mention is often literally several seconds of latency with, say, a 30,000-line file, whether it's with opening, scrolling, editing, or the other more advanced features already mentioned.

I'm honestly pretty baffled this isn't something you've encountered before. This isn't about hertz, it's literally about entire seconds or large fractions thereof.

[jiggawatts]

I regularly use Notepad, Notepad++, TextPad, VS Code, Visual Studio, and the PowerShell ISE. I haven't had any issues with any of them, even when block-selecting or multi-cursor editing.

Notably, they're all Windows native apps written in C++, with the exception of VS Code, which is partially JavaScript.

I've noticed that some of them struggle with huge (1 GB) files, but editing such as large file is a somewhat strange thing to do.

[crazygringo]

I mean, that's great for you. You're just lucky I guess.

But I hope what I described makes sense to you. It's not about 1 GB files at all, it's about regular files. My suspicion is that it's mostly "side features" that start to grind when they get beyond a certain point.

To be more specific with one example, I've used another code editor that a simple "find all" operation will populate a results box. If you mess up your regex to be accidentally super-generic and it finds 100,000 results in your 20K-line file, it takes half a minute to load the results into the results box and become responsive again, with no "cancel" button.

Similarly weird edge cases in a syntax highlighter interacting with a half-finished line of code of yours causes something to choke up. That kind of thing.

Do you understand now? Again, you seem to just be lucky that you haven't encountered this kind of thing.