from dev@pdfbox posted by Tilman Hausherr
While looking at
I noticed that the merge utility makes streams from files... which means that whole files are getting cached to allow random access. IMHO it would be better to keep files as files and streams as streams, i.e. have an array of objects and then "do the right thing".
It doesn't makes sense to create intermediate streams, PDDocument.load should handle different ways of input