[pdftex] pdftex deterministic?

James Quirk jjq at galcit.caltech.edu
Sat Mar 31 18:37:15 CEST 2007

On Sat, 31 Mar 2007, Geoffrey Alan Washburn wrote:

> 	I could swear I had read something about this in the past, but I 
> couldn't remember the correct keywords to find anything via search.  In 
> any event, I recently wanted to make some changes to a the source of a 
> document and to make sure that these changes did not actually affect the 
> document I tried diffing the before and after PDFs.  Unfortunately, 
> after some further experimentation it does not seem that even repeated 
> runs of the same document produce identical output.  Is there any way I 
Are you using a smart diff, i.e. one that is taking into account
the CreationDate and ModificationDate that are stored in the PDF.
If not then repreated processing of the same TeX source will appear
to give different PDF's.


> can modify my documents or the parameters to pdftex to produce identical 
> output on identical inputs?  I realize this very well may not be 
> possible, and if so, what alternatives do people use in practice?  Thanks!
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