As far as the fundamental types go, there's virtually no difference;
for the most part, they use the same code. There is one difference:
symbols are cached in the "ValueFactory", and cached symbols are
likely to do raw equality comparisons a tiny bit faster. Also it's
possible that you'll use less memory with symbols, as duplication will
be reduced. On the other hand, the overhead of cache lookup is a small
performance hit, of course, so in some cases symbols could conceivably
be slower.
Overall, it's a wash. I don't think you'll see much of a difference
either way.
On Sep 3, 2009, at 5:23 AM, jo wrote:
Hi
I have a large quantity of facts to be matched against a rulebase.
Currently the facts use symbols everywhere but it is causing a
headache as some symbols like : cause jess parser exceptions and
need special treatment. Strings would solve this but then I wonder
if that would not cause a performance hit. ie the question is how
does symbol versus string matching compare performance wise in rete?
tx
Joe
---------------------------------------------------------
Ernest Friedman-Hill
Informatics & Decision Sciences, Sandia National Laboratories
PO Box 969, MS 9012, Livermore, CA 94550
http://www.jessrules.com
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