Performance test

test.cs

LogicalExpression testCustomExp = CustomLogicalExpressionHelper.ParseXml(testP);

Expression exp = LogicalExpressionHelper.ParseXml(testP);
var expParams = LogicalExpressionHelper.GetParameters(exp);
LambdaExpression lambda = Expression.Lambda(exp, expParams.Keys);
Delegate d = lambda.Compile();

string[] parameters = new string[] {"a", "b", "d", "e" };
int numberOfTests = 100000;

Stopwatch sw = new Stopwatch();
sw.Start();
for (int i = 1; i <= numberOfTests; i++ )
{
    bool tr = (bool)d.DynamicInvoke(expParams.Values.Cast<object>().ToArray());
}
sw.Stop();

Console.WriteLine("Standard: " + sw.ElapsedMilliseconds);
sw.Restart();
for (int i = 1; i <= numberOfTests; i++)
{
    bool tr = testCustomExp.Evaluate(parameters);
}
sw.Stop();
Console.WriteLine("Custom: " + sw.ElapsedMilliseconds);