I would recommend using the ropey crate for easy performance gains. A string buffer is quick to implement but you will hit a wall as soon as you need to edit large files.

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mizmar 4 hours ago | parent [-]

It's not that bad. You need really large files to notice. The largest realistic file I'll ever touch - sqlite3 amalgamation with 270k lines and 9.1 kB - still takes only 6 ms to memmove it on my poor laptop. Any regular up-to 10k lines file is memmoved in order of microseconds.

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sampullman 3 hours ago | parent [-]

That's true for code editing, but it's nice to not have to reach for a different solution when editing huge files. Sometimes I like to open up big log files, JSON test data, etc.

	▲	mejutoco an hour ago \| parent \| next [-]
		I am always surprised even vim chokes on files with one massive line. That could be a useful optimization too.
	▲	oneeyedpigeon 2 hours ago \| parent \| prev [-]
		Do you actually edit big log files?