Dear Till,
I'am very sorry to bother you again.
But we have to ask you do me a favor to investigate why
cups-filter(foomatic-rip) process takes more time, cause
cups-filter(foomatic-rip)'s investigation is beyond our ability.
We had investigate all printing related filter, and figure out
that cups-filter(foomatic-rip) is the key filter that slowdown the
printing performance.
We are still working hard to looking for cause why Ubuntu 16.04
printing performance slowdown. And many printer users are affected by
this problem, they are eagerly want to known the reason why cause this
problem and get a effective method to improve printing performance.
We appreciate that you can do we a favor on the investigation why
16.04's printing performance slowdown. And if possible, can you share
the investigation result or schedule(date or current
statues:Pending/Investigating/Closed) with us.
Thanks very much.
Best Regards,
--
You received this bug notification because you are a member of Desktop
Packages, which is subscribed to cups in Ubuntu.
https://bugs.launchpad.net/bugs/1801496
Title:
Printing job in 16.04 is slower than in 14.04
Status in cups package in Ubuntu:
Incomplete
Bug description:
Ubuntu 16.04LTS
OS Version： 16.04.5
CUPS Version： 2.1.3
Ghostscript Version： 9.25 （2018-09-13）
Printing job in 16.04 is slower than in 14.04
We(RICOH printer driver developer) are report a problem from our printer
users:
I print file Ubuntu 14.04.5, CUPS 2.1.3,Ghostscript 9.25 is fast(12 Seconds).
But, after I update to Ubuntu 16.04, CUPS 2.1.3, Ghostscript 9.25, I
print the same file with the same driver is slow(326 Seconds).
I figure out that all the print jobs is much slower on Ubuntu 16.04.
I view the "CUPS Error Log", it shows that there are three points
which maybe the reasons that makes the print job slowly.
FIRST:
----------------------------------------------------------------------------
By counting the time from "Starting renderer" to "renderer exited with status
0", we figure out that 16.04 spend more time than 14.04 on "renderer" process.
So we assuming that："renderer" is one of the key process that makes the print
job slowly.
"Starting renderer with command: \"printf \'\\033%%-12345X@PJL
JOB\\012\';printf \'@PJL SET DATAMODE=TWIN\\ ........ @PJL
EOJ\\012\\033%%-12345X\'\""
.....
renderer exited with status 0"
----------------------------------------------------------------------------
SECOND:
============================================================================
On 16.04, a print job outputs lots of logs as below:
"[Job xxx] Removing document files."
This step(“Removing document files”)does not exsit on 14.04.
============================================================================
The phenomenon that print jobs slower in 16.04 is more obvious when printing
many jobs in the same time.
THIRD
We tried drivers form other company(HP,Brother…), the printings also slow
down in Ubuntu 16.04 than 14.04.
Our question is:
1. Do you have any plan to improve the performance of printing on Ubuntu
16.04?
2. Do you have any workaround before this problems fixed?
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/cups/+bug/1801496/+subscriptions
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