Yes I agree, 

I increased the loop count to 5000 and noticed that the "StringBuffer" method 
ran 1/3 to 1/2 quicker than <cfset a = a & "a bit more text, ">.

However when I tried again with a loop count of 500 "StringBuffer" method was 
slower.

my code:

<cfset jsbOutput = CreateObject( "java", "java.lang.StringBuffer" ).Init() /> 
<cfloop index="i" from="1" to="5000">
  <cfset jsbOutput.Append( "a bit more text, " ) /> 
</cfloop>
<cfoutput>
<li>#jsbOutput.ToString()#
</cfoutput>

<cfset a = "">
<cfloop index="i" from="1" to="5000">
  <cfset a = a & "a bit more text, ">
</cfloop>
<cfoutput>
<li>#a#
</cfoutput>

Andrew

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