Performance comparisons of tree models

I have been doing some performance comparisons of different Java XML 
tree models, as used by Saxon, and the results may be of general interest:

http://dev.saxonica.com/blog/mike/2012/09/index.html#000194

Of course, this is a measurement of one particular workload and the 
results may not extrapolate to other workloads.

Michael Kay
Saxonica