Subj : Performance question: Interpreter vs. CodeGen?
To   : netscape.public.mozilla.jseng
From : tdwang@yahoo.com (Tom)
Date : Thu Jan 23 2003 04:17 pm

Hi,

By doing Context.setOptimizationLevel(-1) will force Rhino to call
Interpreter instead of CodeGen when compiling a js function.  In our
app we have a compiled js function and will call it many times, based
on the number of rows returned from database query.  So it's a
compile-once-run-many-times thing.  I wonder if anyone could provide
some hints on the performance difference between using Interpreter vs.
CodeGen?  By looking at the source code there doesn't appear to be big
difference, am I correct?  We had to switch from CodeGen to
Interpreter because we found out that the java classes generated by
CodeGen don't get garbage collected by JVM.

Thanks in advance!

-Tom

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