optimized for loops with count() function calls

docs/appendixes.sgml

@@ -400,7 +400,7 @@ href="mailto:%62%6f%62%40%6d%65%2e%6e%65%74">bob&a
 	<para>
 	Smarty's homepage is located at http://www.phpinsider.com/php/code/Smarty/.
 	You can join the mailing list by sending an e-mail to
-	subscribe-smarty@lists.ispi.net. An archive of the mailing list can be
+	smarty-general-subscribe@lists.php.net. An archive of the mailing list can be
 	viewed at http://marc.theaimsgroup.com/?l=smarty&amp;r=1&amp;w=2
 	</para>
 </chapter>

docs/designers.sgml

@@ -3737,6 +3737,16 @@ OUTPUT:
 			math function will be assigned to this template variable instead of
 			being output to the template.
 			</para>
+			<note>
+				<title>Technical Note</title>
+				<para>
+				math is an expensive function in performance due to its use of
+				the php eval() function. Doing the math in PHP is much more
+				efficient, so whenever possible do the math calculations in PHP
+				and assign the results to the template. Definately avoid
+				repetitive math function calls, like within section loops.
+            	</para>
+			</note>
 <example>
 <title>math</title>
 <programlisting>