http://www.ghostscript.com/doc/current/News.htm
Version 9.14 (2014-03-26) ... Ghostscript now reduces memory usage when processing PDF files that use transparency and output is to display devices such as Windows display or x11 (i.e. devices that are strictly full framebuffer devices), and to high level vector devices that cannot reproduce the PDF transparency model, such as the ps2write device or pdfwrite when 'flattening' to PDF 1.3 or earlier (- dCompatibilityLevel=1.3). This uses banding (clist) files to render the transparent areas in bands to reduce memory use, and unlike the existing page level banding, this is hidden from the target device. -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org