Minor Mode for tracking changes in a buffer

Is there a minor mode in Emacs that will highlight changes made to a buffer? I'm picturing something like highlight tails without a timeout f开发者_StackOverflow中文版eature. I would use highlight tails for this and change the timeout rate to be something huge, but the mode seems to consume a bit of CPU to do the timing (a feature I wouldn't use).

EmacsWiki is usually your friend for things like this. Sounds like you might want highlight-changes-mode.

In short, +1 for Timo's suggestion of highlight changes mode.

And without even resorting to EmacsWiki:

M-x apropos RET highlight changes RET

It's bundled with recent Emacs versions.