I am also seeing this issue on pd4ml version 3.8.0fx3 pro
Seems to have to do with heavy amounts of CSS.
Unfortunately for me, the actual CSS is generally out of my control, so trimming it is not an option.
It is not a server issue. Please benchmark and see for yourselves.
Additionally: It seems to work very fast on a Windows Desktop, but is very noticeably slower on a multi-server Linux Machine. I’m using this through the provided jar, so this shouldn’t be an issue.