Comment 5 for bug 168708

In version 0.47, compressed PDF export is still not supported. This is the workaround:
When it takes a long time for cairo to support for compressed PDF, implement a workaround.

Provide an option when saving as PDF that is called "compress via EPS" or at least provide some text to the users that when compression is needed, to export first to EPS and then convert it to PDF. Which would only work easily on Linux, since these users have epstopdf.

Please improve PDF compression in one way or another (workaround, upgrade cairo, some helpful text, etc.) as soon as possible.