# Using external library (REXML) is extremely slow when running my app in debug mode

**URL:** <https://www.ruby-forum.com/t/using-external-library-rexml-is-extremely-slow-when-running-my-app-in-debug-mode/222530>\
**Category:** IronRuby\
**Created:** [August 31, 2012, 6:50pm UTC](https://www.ruby-forum.com/t/using-external-library-rexml-is-extremely-slow-when-running-my-app-in-debug-mode/222530 "2012-08-31T18:50:00Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![aris](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/258eb7/32.png) [@aris](https://www.ruby-forum.com/u/aris)\
**Post date:** [August 31, 2012, 6:50pm UTC](https://www.ruby-forum.com/t/using-external-library-rexml-is-extremely-slow-when-running-my-app-in-debug-mode/222530/1 "2012-08-31T18:50:00Z")

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Hi All,

I’m using IronRuby as scripting environment inside my app. I use  
scriptEngine.SetSearchPaths() to “include” the REXML files. The problem:  
when I execute my app with F5 (debugger attached), my scripts run  
extremely  
slow if I use REXML classes. If I use CTRL+F5 (no debugger), everything  
is  
fine.

Any tips how to workaround this issue?

Is it possible, that a debugger is hooked inside my ScriptEngine, when  
it  
executes .rb files? If yes, how can I eliminate it? I do not enable any  
debugging options in my engine, and I unistalled the IronRuby VS2010  
extension.

Thanks,  
Anton

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**Author:** ![Anton\_F](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/6de8d8/32.png) [@Anton\_F](https://www.ruby-forum.com/u/Anton_F)\
**Post date:** [September 2, 2012, 10:43pm UTC](https://www.ruby-forum.com/t/using-external-library-rexml-is-extremely-slow-when-running-my-app-in-debug-mode/222530/2 "2012-09-02T22:43:30Z")

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**Author:** ![Anton\_F](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/6de8d8/32.png) [@Anton\_F](https://www.ruby-forum.com/u/Anton_F)\
**Post date:** [September 5, 2012, 9:21pm UTC](https://www.ruby-forum.com/t/using-external-library-rexml-is-extremely-slow-when-running-my-app-in-debug-mode/222530/3 "2012-09-05T21:21:55Z")

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**Author:** ![Anton\_F](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/6de8d8/32.png) [@Anton\_F](https://www.ruby-forum.com/u/Anton_F)\
**Post date:** [September 5, 2012, 9:34pm UTC](https://www.ruby-forum.com/t/using-external-library-rexml-is-extremely-slow-when-running-my-app-in-debug-mode/222530/4 "2012-09-05T21:34:46Z")

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