Using a Groovy Trait to make exceptions usable for flow control.

NoStackTrace.groovy

@Grab(group='org.gperfutils', module='gbench', version='0.4.2-groovy-2.1')
import java.lang.String

trait NoStackTrace {
    Throwable fillInStackTrace() {        
        return this
    }
}

class ExpensiveException extends RuntimeException { }
class CheapException extends RuntimeException implements NoStackTrace {}                 

def r = benchmark {
      'Cheap Exception' {
          def e = new CheapException()
      }
      'Expensive Exception' {
          def e = new ExpensiveException()
      }
}
r.prettyPrint()

/**
 * Environment
===========
* Groovy: 2.3.6
* JVM: Java HotSpot(TM) 64-Bit Server VM (25.0-b70, Oracle Corporation)
    * JRE: 1.8.0
    * Total Memory: 231 MB
    * Maximum Memory: 3641 MB
* OS: Mac OS X (10.9.3, x86_64)

Options
=======
* Warm Up: Auto (- 60 sec)
* CPU Time Measurement: On

                     user  system   cpu  real

Cheap Exception        36       0    36    37
Expensive Exception  7621       2  7623  7625
*/