Direct Print Performance
Printing bottlenecks are usually slow printers. However, there are several things that you can work on in the direct print solution that may improve the performance of your environment.
Spooling
It can help with printing performance if you set your printer properties to spool the jobs before printing.
Scaling
You can install the service on multiple machines or multiple instances on one machine.
Optimize the polling
Configuration and polling strategy is described in this Knowledge base article: