Just to capture it, I got the printer model one of our customers is having the problem with:
Konica Minolta bizhubC300i On Sat, Nov 30, 2024, 3:14 PM Kevin Day <ke...@trumpetinc.com> wrote: > Thanks for the test - it is a good additional data point. If you are able > to easily test on Windows, and it fails, that would be very good > information to have. It might mean I need to open an issue with OpenJDK. > > > All of our customers run Windows OS, so that is the only environment we > can test with equipment available to us. I have tested with Windows, Java > 11, 21, 23 and with 32 and 64 bit variants, and we see the same behavior in > all. I've been testing on a Canon LBP6000 (consumer grade laser printer). I > don't know the MFP printer model numbers that our customers who have > reported the problem have. > > I am very hesitant to point fingers, but I am beginning to think that the > issue is somewhere deep in the Java-Windows Printing native interface. It > could even depend on the type of native driver (PCL vs PS vs ???). > > > Side discussion on rasterizing performance: > > The reason that rasterizing improves performance in our tests is that the > print job gets run multiple times with different clipping regions > (horizontal stripes at different vertical offsets). Without the > rasterization, the print job renders around 20 times. With rasterizing, it > renders only twice. > > This could very well be behavior of Windows printing (maybe to reduce RAM > requirements of the print job so they don't have to cache the full page > contents before sending to the printer? Who knows). > > I'm in agreement with Tilman on this - ultimately, printing is such a slow > operation that optimizing the Java code is probably not worth the effort or > risk of introducing subtle problems. > > Thanks, > > K > > > On Sat, Nov 30, 2024, 11:48 AM Tres Finocchiaro < > tres.finocchi...@gmail.com> wrote: > >> > >> > So the only way I can demonstrate the failure is to actually print to >> > physical paper (you can imagine that this is driving us crazy). I am >> > including code to actually run the print jobs at the bottom of this >> email. >> >> >> Hi, I'm just a community member but wanted to offer some testing... >> >> - MFP (consumer grade Epson WorkForce Pro) >> - Java 11 >> - MacOS arm64 >> - All 5 pages of the problematic doc printed fine (tested twice) >> >> I'd be happy to test on Windows if you believe the bug may be related to >> the OS, but I also wanted to see if you've tried to print on other >> operating systems, as this may help narrow down the cause. >> >> My debugging also shows that rasterizing improves printing performance by >> a >> > factor of 10. >> >> >> Just a comment, but this is the first I've heard of rasterizing improving >> performance so much. >> >
