Rule Evaluation Performance Tips

Rulesets

The Code Effects rules engine is extremely fast. We have demonstrated evaluating an array of ONE MILLION randomly filled objects against an evaluation type rule in a single thread in less than 10 milliseconds (0.010 sec).

Even though performance is excellent, it still makes sense to optimize your evaluations where possible.

The most expensive operation is compiling your rule(s) during initialization of the Evaluator class. If you need to evaluate multiple rules against the same data, you can combine them into a single ruleset by inserting them into an empty XML document and passing that ruleset as your RuleXML to the Evaluator constructor:

<?xml version="1.0" encoding="utf-8"?>
<codeeffects
	xmlns="https://codeeffects.com/schemas/rule/41"
	xmlns:ui="https://codeeffects.com/schemas/ui/4">

		<rule id="ID1" ...>
			<!-- Rule #1 -->
		</rule>

		<rule id="ID2" ...>
			<!-- Rule #2 -->
		</rule>

		<rule id="ID3" ...>
			<!-- Rule #3 -->
		</rule>

		...

</codeeffects>

Evaluator Instances

If at all possible, reuse Evaluator instances to run multiple data sets against the same rules. Each instance already holds the compiled rules, and recompilations are expensive, so caching and reusing one avoids unnecessary overhead.