Bug 691220

Summary:	ps2pdf makes a file 3X larger
Product:	Ghostscript	Reporter:	William Bader <williambader>
Component:	PDF Writer	Assignee:	Ken Sharp <ken.sharp>
Status:	RESOLVED DUPLICATE
Severity:	normal
Priority:	P4
Version:	8.71
Hardware:	PC
OS:	Linux
Customer:		Word Size:	---
Attachments:	the original pdf 300 KB pdf produced by pdfsizeopt http://code.google.com/p/pdfsizeopt/

Description William Bader 2010-03-26 16:08:34 UTC

ps2pdf usually makes files smaller, but the attached example is 832,319 bytes, and ps2pdf produces a 2,510,111 byte result. The resulting file also has some loss of image quality. The example is from http://code.google.com/p/pdfsizeopt/ That application produces a 317,328 pdf with no loss of quality (confirmed by running pdfimages from xpdf and comparing the 183 extracted images).

Comment 1 William Bader 2010-03-26 16:09:27 UTC

Created attachment 6132 [details]
the original pdf

Comment 2 William Bader 2010-03-26 16:11:22 UTC

Created attachment 6133 [details]
300 KB pdf produced by pdfsizeopt http://code.google.com/p/pdfsizeopt/

Comment 3 Ken Sharp 2010-08-13 10:44:05 UTC

The original PDF file makes quite extensive use of Form XObjects. pdfwrite currently doesn't support output of Form XObjects (except for certain classes of transparency) so each time a Form is encountered its content atream is written to the output file.

This is essentially a duplicate of #691202

*** This bug has been marked as a duplicate of bug 691202 ***