[#2723] Note about multiple tokens

diff --git a/doc/sphinx/arm/classify.rst b/doc/sphinx/arm/classify.rst
index 9f279454b78afa9e69b66b5ca4ba90a9ee5364e8..aaa2e527706e18e2e0d803e5e3b9d18549776f42 100644 (file)
--- a/doc/sphinx/arm/classify.rst
+++ b/doc/sphinx/arm/classify.rst
@@ -920,7 +920,10 @@ hex string (which would indicate a DUID based on an enterprise ID of
    }
 
 It is also possible to have both left and right operands of the evaluated
-expression processed at runtime.
+expression processed at runtime. Expressions related to packets can appear in
+the expression as many times as needed. There is no limit. However, each token
+has a small impact on performance and exceedingly complex expressions may be a
+major bottleneck.
 
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