title: Tools for analyzing application perfomance
body: <p>We have application deployed on customer's server where we haven't any access. 
  Only thing which we can to do ask someone to make trivial operations(use profiler is not trivial operation) and change our code to add logger for example.</p>
  
  <p>So i want to know is there any good logger specialized on perfomance. I know about log4net but it is just log some information. It would be good to get reports with charts and represent measures of code in hierachical view. I want logger which separate requests from different users. Ofcourse i can write it by myself but maybe there are exists some good free tools?</p>