Embedded PDF/AI images causes documents created from IDMLs to double in size
File size almost doubles when exporting an INDD document to IDML and then re-save it as an INDD if it has embedded PDF or AI images.
Create a new InDesign document.
Place a PDF/AI image in it.
Embed the image in the InDesign file.
Save the InDesign file.
Export the InDesign file to IDML.
Open the IDML and save it as an INDD document.
The resulting INDD document will have a file size of almost double the size of the original INDD document. This affects all versions of InDesign (CS6-CC2019) and embedded PDFs created in different applications (Illustrator, Acrobat, Preview).
If this is caused by an extra preview of the image being attached to the INDD document, there should at least be an option to "trim" the INDD document.
Attached are three test documents: original, IDML and the resulting INDD document.