Hello friends,
I am using iText to build PDF files that have other
PDF files embedded in them. These embedded PDF files
are basically single page Logos that are placed at
certain locations on the final PDF file. The final
output can contain from 1 to 120 pages. Each of these
pages will have the logo files embedded on them. The
location of these files is calculated based on some
data from a database.
The building of these files works out fine, however I
notice that the final PDF filesize is way larger than
the sum of the filesizes of all the embedded PDFs.
e.g. I embed 5 PDFs on a page and the total size of
all these PDF files amounts to 330Kb. But, after
adding some tables and about 7-8 lines of text, the
size of the final PDF comes to around 2020Kb. This PDF
consists of 1 pages, with 5 embedded PDF files and
about 7-8 lines of text. I also embed 1 font into this
file, as I am using a custom font for 2 lines of text
in the final PDF. The font file is about 107Kb in
size. This still leaves about 1400Kb of excess file
size that I cannot explain.
The problem worsens when we start producing 40 page
PDF files. One such file was about 69 Mb in size. This
file also used about 500Kb size worth of embedded PDFs
on each page. Which calculates to about 20-25Mb for
the final PDF. I am still unable to explain the excess
50 Mb here. I shudder to think of the file size when
we build PDF files with 60 or 120 pages. The user
complains of memory and performance problems when they
try to open and print these files.
Am I missing something here, specifically with
embedded PDF files? I have read that the resultant
file size is offset by some degree when a PDF file is
embedded into another PDF file. But, I cannot digest
the fact that the offset is so ridiculous. Which leads
me to believe that I am probably not doing this right.
Any pointers in this regard will be highly
appreciated.
Thank you,
Yatin Kareer.
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