On Dec 28, 2013, at 10:11 PM, Eric Wing <ewmail...@gmail.com> wrote:

> But I did notice a new problem. At around 800,000 lines, the
> NSTextView stops displaying new appended text.

The Cocoa text system really doesn’t scale well to such huge amounts of text. 
The only apps I know of that can handle really large amounts, use custom text 
engines. (Terminal, for instance.)

If you just need read-only text without soft wrap, it’s not terribly hard to 
build your own text display engine. (There might even be an open source one?)

—Jens
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