Dear Till, Thank you very much for taking your time to help investigate this issue and providing us a way to judge if "Ghostscript" causes the slowdown of "pdftops" even when you are so busy.
If possible, can you do us a favor on the below investigation： We found that Ricoh PS driver does not slow down very much actually, we found that the drivers which uses "pxlcolor / pxlmono" slow down obviously, so we provided error_log of Ricoh pxlcolor driver in #9. You can refer to the error_log in #9 on this page. In this log, we can see that the time interval between [Starting process "renderer"] and [Closing renderer] really slowdown obviously in Ubuntu 16.04 than in 14.04. In the interval, there is "Running command line for gs". We doubted that maybe the Ghostscript causes the slow down, but the developer of Ghostscript proved that the gs only slowdown very little time. Please refer to https://bugs.ghostscript.com/show_bug.cgi?id=700380 So, we doubted that maybe the module around Ghostscript(for example: foomatic-rip) causes the slow down. Could you have a look at the log in #9 (and later), and do some analysis when you have time? If you have further investigation result, it’s appreciated to share with us. 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 -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
