Slow printing - HP Deskjet D2360 InkJet Printer

You can try updating the firmware

This link explains how to troubleshoot slow printing.

Slow Printing HP Officejet 4500 Desktop All in One Printer G510b HP Support

the print file detail may be multi-layered may be too much information in print job- your printer memory may not be adequate, you may be printing through a slow network, you may be printing through an older print server which is as slow as parallel port printing or you may be printing through your parallel port which is slow.

Printing in color is always slow vs. printing in B/W. If your printing color with the highest resolution setting, it will print really slow. You can adjust the resolution settings in Printer Properties for the Lexmark. If you want faster print, select a lower resolution.

Expect pictures to print slow no matter what.
For letters and all text documents set your printer up to print draft for the best printing speed.

By the sound of it you are printing via the serial port, slow printing is normal for the Eltron (EPL) base printers

Epson R230 print slow at PHOTO, very slow at BEST PHOTO, if you do not need photo quality prints try printng at TEXT AND IMAGE for faster printing and the quality is still good. Also try to lower the resolution of that you are about to print, high the resoluton images takes longer time to print. Hope this will help you, Good luck!

try saving the things you want to print as a pdf file, then print them from there

printer hp laserjet 1020 its working when giving first page to print but after gives second page its take time

Cartridges may give a very slow printing if internally damaged, or :
When using colored paper in the all-in-one, printing or copying is slow.This issue is a result of the automatic paper type sensor misreading the colored paper as photo paper. The print out takes longer because the unit is printing in Best mode instead of Normal mode.

1. Click Start , point to Settings , and then click Control Panel .
2. Double-click Printers and Faxes .
3. Right-click the appropriate all-in-one, and then click Printing Preferences .
4. Click the Paper/Quality tab and under Type is: select Plain Paper . This sets the default paper type setting to Plain Paper.

Hope this helps.