testemptyloop.cfm

<cfsetting requesttimeout="300">


<cfparam name="nIterations"	default="5">
<cfparam name="nMultiple"	default="1">


<cfset iTarget = 10000000 * nMultiple>


<cfdump eval="nIterations">
<cfdump eval="nMultiple">

<cfdump eval="iTarget">


<style>

	div.fl	{ float: left; margin: 2em; padding: 1em; }
</style>


<div>

	<div class="fl">
	
		<div>original loop</div>
		
		<cfscript>

			for(k=1;k lte nIterations; k++) {

				iLoopTime = getTickCount();

				loop from="1" to="#iTarget#" index="i" {}
				
				iLoopTime = getTickCount() - iLoopTime; writeDump(iLoopTime); flush;
			}

		</cfscript>
	</div>

	<div class="fl">
	
		<div>structDelete()</div>
		
		<cfscript>

			for(k=1;k lte nIterations; k++) {

				iLoopTime = getTickCount();

				loop from="1" to="#iTarget#" index="i" {}

				iLoopTime = getTickCount() - iLoopTime; writeDump(iLoopTime); flush;

				structDelete(variables, "i");
			}
		</cfscript>
	</div>

	<div class="fl">
	
		<div>set i = 0</div>
		
		<cfscript>

			for(k=1;k lte nIterations; k++) {

				i = 0;

				iLoopTime = getTickCount();

				loop from="1" to="#iTarget#" index="i" {}

				iLoopTime = getTickCount() - iLoopTime; writeDump(iLoopTime); flush;
			}
		</cfscript>
	</div>

	<div class="fl">
	
		<div>index="variables.i"</div>
		
		<cfscript>

			for(k=1;k lte nIterations; k++) {

				iLoopTime = getTickCount();

				loop from="1" to="#iTarget#" index="variables.i" {}

				iLoopTime = getTickCount() - iLoopTime; writeDump(iLoopTime); flush;
			}
		</cfscript>
	</div>

	<div class="fl">
	
		<div>to="#variables.iTarget#" index="variables.i"</div>
		
		<cfscript>

			for(k=1;k lte nIterations; k++) {

				iLoopTime = getTickCount();

				loop from="1" to="#variables.iTarget#" index="variables.i" {}

				iLoopTime = getTickCount() - iLoopTime; writeDump(iLoopTime); flush;
			}
		</cfscript>
	</div>

</div>

<br style="clear:both;">