tinytree behaviour with document function

Hi,

we've got a problem here with Saxon (6.3.. but also tried on 8.4) in
terms of memory usage.  We have a file that is 140 meg on disk on disk
and two stylesheets:

  * Style sheet A processes the file as input, and loads 3 files using
document()
  * Style sheet B processes a small file and loads the big file using document()

The behaviour of Saxon in both cases is different. Style sheet A uses
about 300 meg of memory (good performance!) but style sheet B uses
over 900. Here is some trace output:

Building tree for file:/export/home/nentwich/saxon_test/magix-instrument.xml usi
ng class net.sf.saxon.tinytree.TinyBuilder                                      
Tree built in 154548 milliseconds                                               
Tree size: 2996345 nodes, 7816417 characters, 32097 attributes                  

Building tree for file:/export/home/nentwich/saxon_test/magix-instrument.xml usi
ng class net.sf.saxon.tinytree.TinyBuilder                                      
Tree built in 123578 milliseconds                                               
Tree size: 5787574 nodes, 77191047 characters, 32097 attributes                 

As you can see, when it is loaded using the document function it is a
lot bigger. My analysis seems to indicate that this is due to Saxon
setting up the tree builder differently (not eliminating whitespace).

Is this correct? And if yes, why does it not eliminate white space?
Our file sizes are about to jump and this would make it impossible to
use XSLT for this transformation in the future. Can we simply turn on
white space stripping for included docs?

thanks,
Christian


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