Good point, although 18 MB of text is a lot of text.
If I might digress a bit… most text editors will choke on an 18 MB text file as well (and if it’s an 18 MB text file with just one line (like a base64 string with no line breaks)… good luck getting anything other than a hex editor to open that with any speed). The only text editor I’ve found that doesn’t bog down too much when opening huge text files (even some of the ones with no line breaks!) is the one that comes with OS X: TextEdit¹.
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