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5 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.
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7 = Profiling using a Profiler =
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9 The best tool for the job is of course a [[profiler>>http://en.wikipedia.org/wiki/Profiling_(computer_programming)]]. Follow the steps:
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11 * Get a [[profiler>>http://en.wikipedia.org/wiki/Profiling_(computer_programming)]](((
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13 For XWiki committers, we have free YourKit licenses for developing on XWiki.
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15 )))
16 * [[Build XWiki>>Building]] or simply download a XWiki binary release
17 * Check your profiler's documentation to see the command line that needs to be added when starting the XWiki JVM.
18 * 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"##)
19 * Run the Profiler and then start XWiki
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21 = Profiling using Byteman =
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23 See [[Byteman>>http://www.jboss.org/byteman]] and the [[XWiki Byteman tutorial>>Debugging#HUsingByteman]].

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