It would be good to not include this OOXML attachment in every shape in the presentation. Multiplied by the number of shapes it perfectly explains why the resulting. The size of the attached OOXML package varies from 2100 to 2600 bytes. The contents is a OOXML package containing the following entries: Modified shape container as saved by PowerPoint 2011: Original shape container as saved by PowerPoint 2003:

very schematically it can be outlined as follows: ItĪppears that PowerPoint 2011 attaches additional data to every shape in the presentation and this addition data is a mini-OOXML package containing two entries: downrev.xml and shapexml.xml. Apache POI is a set of APIs for Microsoft Documents and provides a programmatic way to walk the PowerPoint stream and examine the low-level structures. I analyzed the saved files using the tools included in the Apache POI project (). PowerPoint 2003 for Windows and PowerPoint 2008 for Mac have no problems reading / writing the observed files, so it seems to be a regression in PowerPoint 2011. Than a minute! The worse is that PowerPoint 2011 dies when saving really large. Saving of a file with one slide and 100 shapes takes less than a second, but saving of a file with 50 slides and more than 10K of shapes takes more ppt file in PowerPoint 2011 growths exponentially with the number of shapes. #slides #shapes Original size Size after save in PowerPoint 2011Īlso note that the time to save a. ppt file, the larger is the output saved by PowerPoint 2011 for Mac. Of the size increase seems to depend on the number of shapes, that is, the more shapes you have in the source. ppt file created in PowerPoint 2003 for Windows and save it in PowerPoint 2011 for Mac then the result is almost ten times larger than the original. ppt files saved by PowerPoint 2011 for Mac are considerably larger than the originals. I would like to report a bug in PowerPoint 2001 for Mac

Powerpoint for mac 2011