I have a black and white HP laser printer. Certain PDF documents take a long long time to render before they’re printed; for example, airline boarding passes. There’s a color to B&W conversion, the image has to be scaled to fit the margins and I don’t know what else is involved. But it takes five to eight minutes before a page comes out of the printer. Other kinds of documents (for example .doc, .txt, or .png) print immediately.
The computer is an i7-7700k with 16 GB of RAM running Ubuntu 18.04.2 LTS.
I’ve searched online for ways to speed the print rendering. I am guessing that it might help if I can give printing a high priority among the running processes. However, I’ve had no luck at all finding a way to do this.
Does anyone have any suggestions?