[okular] [Bug 436738] docdata duplicated each time pdf is edited

[David Hurka]

https://bugs.kde.org/show_bug.cgi?id=436738

--- Comment #14 from David Hurka <david.hurka at mailbox.org> ---
> My answer was to pbs3141 that was suggesting something 
> different as far as I understand.
Ok, now I understand. pbs3141 and me suggested mostly the same, just that my
suggestion does not use any filepaths, and so does not need to process docdata
files to decide whether to delete them.

The fear for collisions is probably real for .txt files and similar, where two
different documents can easily have the same first 4kB. (The text on the first
two pages are the same.) The SHA algorithms don’t make collisions that we
should care about. :)

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