[rules-users] MVEL interpretation

[Mark Proctor]

MVEL compiles the string to it's own evaluation tree, it then 
"evaluates" that tree at runtime so simulate runtime code. We do a 
further optimisation for performance where after MVEL executes a 
statement so many times, we'll JIT it to bytecode to get improved 
execution performance.

Mark
On 26/03/2012 20:04, Mike Melton wrote:
> My team is using Drools on a government project. As is usually the 
> case with government projects, the security folks have their hands in 
> every aspect of the project. They have big questions on MVEL, but I'm 
> going to try to boil them down to one simple question:
>
> At what stage(s) of Drools's lifecycle does MVEL interpretation occur? 
> I think that the compilation engine interprets the MVEL at compile 
> time and converts it to generated Java code, though I don't know 
> enough about the internals of the engine to say for sure. Stated 
> another way, does Drools interpret rules written using the MVEL 
> dialect at runtime?
>
> Thanks
> Mike
>
>
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