Re: Re: gropdf, Ghostscript, and file sizes

[Jan Eden]

Hi Oliver,

yes, Branden referred to (the lack of) font subsetting – but two
different toolkits are responsible for the largest files (groff/PDF +
ps2pdf with standard fonts, groff/PDF with additional fonts), and I
wonder why.

- Jan

On 2024-04-22 21:08, Oliver Corff wrote:

> Hi,
> 
> probably the massive difference in size is due to embedding the whole
> font in the PDF document, I assume.
> 
> Best, Oliver.
> 
> On 22/04/2024 16:56, Jan Eden wrote:
> > Hi,
> > 
> > I learned that gropdf in general tends to create larger files than a
> > combination of groff and Ghostscript (ps2pdf):
> > 
> > groff -Tps test.tr | ps2pdf - test.pdf → 18K
> > groff -t -Tpdf test.tr > test.pdf → 313K
> > 
> > This holds true even when pdf is specified as groff's output device and
> > the output is then piped to ps2pdf:
> > 
> > groff -Tpdf test.tr | ps2pdf - test.pdf → 19K
> > 
> > The results above are based on a single-page file set in an Open Type
> > font I added to groff.
> > 
> > But today I came across an interesting effect with the standard fonts
> > (results for H, similar for T etc):
> > 
> > groff -Tps test.tr | ps2pdf - test.pdf → 13K
> > groff -t -Tpdf test.tr > test.pdf → 12K
> > groff -Tpdf test.tr | ps2pdf - test.pdf → 2.6M
> > 
> > Why is gropdf more efficient than groff+Ghostscript with the standard
> > fonts – and why does groff create such gargantuan files for the PDF
> > output device when coupled with ps2pdf?
> > 
> > - Jan
> 
> --
> Dr. Oliver Corff
> Wittelsbacherstr. 5A
> 10707 Berlin
> GERMANY
> Tel.: +49-30-85727260
> mailto:oliver.corff@email.de

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