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

["Henri Biestro (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/JEXL-146?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Henri Biestro resolved JEXL-146.
--------------------------------
    Resolution: Fixed

> 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
>             Fix For: 3.0
>
>
> 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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