I have looked into the error_log files and the processing by the filters
on 16.04 takes ~20 seconds and on 14.04 less time. The 326 seconds you
observe on 16.04 is caused by the printer's processing of the PostScript
it receives. The PostScript is generated by Ghostscript (you find the
Ghostscript command lines used in the error_log files).
So it seems that the newer Ghostscript version used by 16.04 is
processed much slower by your printer than the PostScript of 14.04's
Ghostscript version.
Next thing you should investigate is to directly run the Ghostscript
command lines with your file in a terminal window, once on 14.04 and
once on 16.04. Send the resulting files directly to the printer ("lp -d
... -o raw ..." or "nc -w1 <IP> 9100 < <file.pdf>".) If you get the same
time difference, please post a bug report on Ghostscript,
http://www.ghostscript.org/.
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https://bugs.launchpad.net/bugs/1801496
Title:
Printing job in 16.04 is slower than in 14.04
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