Detect buffer change

[Jörg Sommer <joerg@xxxxxxxxxxxx>]

Hi,

is it somehow possible to detect a change of the buffer content? The
modified flag doesn't help, because the modified flag doesn't change, if
the buffer changes.

I want to implement caching of function calls to improve the performance
of my LaTeX mode. Therefore, I must know if something has changed since
the last call. Is this possible?

I found no hook for this. For a before_key_hook it's impossible to detect
what it does and another hook doesn't sound usable.

Bye, Jörg.
-- 
Gott hat den Menschen erschaffen, weil er vom Affen enttäuscht war.
Danach hat er auf weitere Experimente verzichtet.
                                                          (Mark Twain)

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