Arlen Holder wrote:
On Mon, 14 Oct 2019 17:45:44 -0400, Paul wrote:

mutool info sample.pdf

Hi Paul,
We forgot to list free pdf optimization, aka shrinking the file size,
compression, making the file smaller, downsampling, whatever.

Reprocessing PDFs for that purpose, changes the date,
creator, messes with fonts, whatever.

There's no real profit in this.

Messing with PDFs is for repurpose-ment, such as deleting
sections of no value, or removing information that doesn't
belong there. With the understanding it's a "derived"
document, and if the statistics are disturbed, it's
"document -- my_document(privatecopy)". But after
a file is repurposed, there's no need for additional
spit-polish. Job is done.

It's been a long time, since a PDF tool made such
a mess, I'd consider a pass for optimization as being
necessary. At one time, there was a big difference between
the tools, but today, from a file size perspective, and
considering the large size of rotating disk drives, this issue
is moot. I just did backups yesterday, and out of the
3TB backed up, the amount of "excess bytes" in the PDF
collection represents a "fly fart". It would be a bad
use of my time to save 10MB out of 3TB, by reprocessing
some PDF files.

Paul