To analyse a DEM file convert it into a text file and use DEMA. DEMA is a very simple Perl script, which may give you the time per level, the level name and the average frame time (client update time).
This Perl script is total incomplete but it may be helpful yet. There are no command line switches. You have to edit the script to change the summary.
I wrote DEMA in Perl, which is very good at pattern matching and extraction. I will never write a C version, so write one yourself or install Perl.
The main aim of DEMA is to show a sample framework for any kind of DEM text analysing.