We looked at the "Page Setup..." options for the document you sent. The
"Unlimited Downloadable Fonts in a Document" option was turned on. With
this option enabled, any font that the driver downloads is purged as soon
as another font is used, even if this other font is in the printer's ROM.
The document has Zapf Dingbats characters interspersed throughout. Zapf
Dingbats is downloaded the first time the font is used. As soon as another
font is used, Zapf Dingbats is purged from memory. When it's used again,
the LaserWriter driver has to download the font again. Because of the
layout of the document, the Zapf Dingbats PostScript is downloaded dozens
of times.
If you disable the "Unlimited Downloadable Fonts in a Document" option, the
document takes 30 seconds to print on the LaserWriter IIf.