I’ve noticed that some of our unit tests are running a little long and I’m trying to figure out which ones are taking the longest. While TeamCity has some nice NUnit timing info, it’s a pain to build the whole thing on the build server when I can just try things out locally.

If you have NUnit writing XML output in your command line build (using the /xml: switch) then you can use Log Parser to query the XML file and write a little CSV report with the timings in it:

LogParser.exe "SELECT name, time FROM Results.xml#//test-case ORDER BY time DESC" -i:xml -fMode:Tree -o:csv

A little fancier: take all of the tests across several reports and write the output to a file rather than the console:

LogParser.exe "SELECT name, time INTO timings.csv FROM *.xml#//test-case ORDER BY time DESC" -i:xml -fMode:Tree -o:csv

And fancier still: Take all of the reports across multiple test runs and get the average times for the tests (by name) so you can see which tests over time run the longest:

LogParser.exe "SELECT name, AVG(time) as averagetime INTO timings.csv FROM *.xml#//test-case GROUP BY name ORDER BY averagetime DESC" -i:xml -fMode:Tree -o:csv