I have looking for ways to speed up PDF generation. I wanted to let everyone know my findings.
My test was done in PB 2017 Build 1666. The DataWindow is a basic grid with enough rows to fill two and a half pages. I ran the test ten times for each method and threw out the high and low values.
Amyuni - 0.198 seconds - 17,944 bytes
GhostScript - 0.575 seconds - 18,464 bytes
NativePDF - 0.611 seconds - 20,782 bytes
The NativePDF option is slightly slower and creates files that are slightly larger. The Amyuni solution takes one-third the time as Ghostscript.
The Appeon folks might want to look at ways to make their solution faster once any the quality issues have been solved.