At some point we were looking for a Postscript file that would bog down the
printer for contention testing, without generating reams of paper. This
snippet keeps the printer here busy for about 45 mins and prints 1 sheet.
Of course you can adjust the loop count to vary the time taken.
--------Begin Postscript------------
%!
1 1 100000000 { pop } for
/Times-Roman findfont 32 scalefont setfont
/x (TEST) def
0 setgray
306 x stringwidth pop 2 div sub 396 moveto x show
showpage
--------End Postscript------------