Profiling is useful to find out performance bottlenecks and find out memory hogs. There are 2 types of tools that can be easily used to profile XWiki.

Profiling using a Profiler

The best tool for the job is of course a profiler. Follow the steps:

• Get a profiler

  For XWiki committers, we have free YourKit licenses for developing on XWiki.

• Build XWiki or simply download a XWiki binary release
• Check your profiler's documentation to see the command line that needs to be added when starting the XWiki JVM.
• If you're using YourKit you can start XWiki with the following command line: start_xwiki_debug.sh 8080 profiler /path/where/agent/is (for example: start_xwiki_debug.sh 8080 profiler "/Applications/YourKit Java Profiler 7.0.11.app/bin/mac")
• Run the Profiler and then start XWiki

Profiling using Byteman

See Byteman and the XWiki Byteman tutorial.