[jira] [Created] (JEXL-146) Performance problem in Interpreter.unknownVariable mechanism

["David Maplesden (JIRA)" <ji...@apache.org>]

David Maplesden created JEXL-146:
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             Summary: Performance problem in Interpreter.unknownVariable mechanism
                 Key: JEXL-146
                 URL: https://issues.apache.org/jira/browse/JEXL-146
             Project: Commons JEXL
          Issue Type: Bug
    Affects Versions: 2.1.1, 3.0
            Reporter: David Maplesden


When JEXL is used in non-strict mode it silently ignores unknown variables.  However it still constructs a {{JexlException.Variable}} exception, even though it doesn't throw it.

Constructing exceptions in Java is expensive.  If you happen to have a situation where unknown variables are common then this becomes a performance problem.  It is showing up as an issue in our application.

Inspecting the source of {{Interpreter}} it looks like a similar issue could also occur with a number of the other exceptions.  They are always created, even if they are not going to be thrown.



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