Why the printer is very slow?
There can be plenty of answers as to why your printer is very slow. May be its the drivers, USB ports, or even network or wireless printer issue etc. It can be QUALITY vs SPEED issue too.
It has to be the printer itself – nothing else can affect the speed of the printer. But if your printer is new, then contact your seller and explain, or use a help line to ask customer service for technical help.
You can also check the settings for the printer, the chances are you might have the printer set to photo quality printing which will not only take ages to print but will also use more ink there should be a setting for normal printing.
If your printer is on a network then
Go to the printer front panel
Select TROUBLESHOOTING>SERVICE TOOLS>RESET NVRAM.
Let it reset, it will acquire the new IP address and be good to go.
It will require you reset the printer's IP in the Printer Properties menu on each computer on the network.
Lastly if you can tell a little more specification about your printer or the network it will also help me to diagnose the problem.