Rob
What CPU are you running this on?
My times are about twice as long ( the 3:1 ratio is approx the same).
I was surprised because My 800MHz Mac usually runs faster than most
CPUs that are twice the MHz.
Below is the exact routine I used.
Dick
=========================================================
<cfscript>
start=GetTickCount();
sb_filler = createObject("java","java.lang.StringBuffer");
for(x=0; x lte 65535; x=x+1){
sb_filler.append(chr(x));
}
end=GetTickCount();
</cfscript>
<cfoutput>
<code>
<br>String Buffer Duration...#end-start#........Original Average:
5609 ms
</code>
</cfoutput>
<cfscript>
start1=GetTickCount();
s_filler = "";
for(x=0; x lte 65535; x=x+1){
s_filler = s_filler & chr(x);
}
end1=GetTickCount();
</cfscript>
<cfoutput>
<code>
<br>String Duration..........#end1-start1#........Original Average:
17250 ms
</code>
</cfoutput>
=========================================================
On Wednesday, November 27, 2002, at 12:16 PM, Rob Rohan wrote:
> Ok, so in Java using a String can cost a lot when you have to append
> over
> and over (because I think it makes a new String object for each
> iteration) -
> to fix this you're supposed to use a string buffer. So I decided to try
> using a string buffer in MX to see if I could get a bit of a
> performance
> gain... check it out
>
> with string buffer:
> <cfscript>
> sb_filler = createObject("java","java.lang.StringBuffer");
>
> for(x=0; x lte 65535; x=x+1){
> sb_filler.append(chr(x));
> }
> </cfscript>
> <cfoutput>#sb_filler.toString()#</cfoutput>
>
> ** Average: 5609 ms **
>
>
> normal string
> <cfscript>
> s_filler = "";
>
> for(x=0; x lte 65535; x=x+1){
> s_filler = s_filler & chr(x);
> }
>
> </cfscript>
> <cfoutput>#s_filler#</cfoutput>
>
> ** Average: 17250 ms **
>
> You wont see a bit performance in crease with little appends, but it
> makes a
> difference with big ones.
>
>
> (I can believe Macromedia doesn't want me to work for them :-/ jezzz)
> Rob
>
> http://treebeard.sourceforge.net
> http://ruinworld.sourceforge.net
> Scientia Est Potentia
>
>
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~|
Archives: http://www.houseoffusion.com/cf_lists/index.cfm?forumid=4
Subscription:
http://www.houseoffusion.com/cf_lists/index.cfm?method=subscribe&forumid=4
FAQ: http://www.thenetprofits.co.uk/coldfusion/faq
Structure your ColdFusion code with Fusebox. Get the official book at
http://www.fusionauthority.com/bkinfo.cfm
