The Performance Cost Of Throwing Exceptions (or Custom Exceptions) In ColdFusion

A couple months back, I read Ben Nadel's blog on The Performance Cost Of Throwing Exceptions In ColdFusion.  It made me curious how my custom validation exception would perform.  Using Ben's code, I ran a base test on my computer to have an apples to apples comparison.


The ColdFusion cfthrow Test

Throw Exception: false 

• Results: 63 
• Results: 63 
• Results: 47
  
• Results: 62
  
• Results: 62

Throw Exception: true

• Results: 890 
• Results: 718
  
• Results: 672
  
• Results: 672
  
• Results: 1,219

Custom Exception for Validation
Throw Exception: false 

• Results: 62
  
• Results: 62 
• Results: 63
  
• Results: 62
  
• Results: 63

Throw Exception: true

• Results: 422
• Results: 438
• Results: 406
  
• Results: 422
  
• Results: 391

 I'M BAFFLED! 

I expected my custom exception to run slower than coldFusion's exception. My java code just inherits RuntimeException, and then I cfthrow object="javaObject".  I'm curious what cfthrow message="me" does that it is twice as slow.