Good call, then you avoid the overhead of the object creation; however, there are other things you can do with a string buffer that you can't do with a simple array.
I dig your example. Rob http://treebeard.sourceforge.net http://ruinworld.sourceforge.net Scientia Est Potentia -----Original Message----- From: Jochem van Dieten [mailto:[EMAIL PROTECTED]] Sent: Wednesday, November 27, 2002 2:10 PM To: CF-Talk Subject: Re: Check this out - MX performance enhancer 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 Using an array instead of a string gives a higher performance boost, even when using plain CFML. The array version below runs about 10 times faster as the Java version with a string (although after checking they were of identical length I didn't check whether the strings were identical: <cfset highnumber = 65536> <cfset start = GetTickCount()> <cfscript> sb_filler = createObject("java","java.lang.StringBuffer"); for(x=0; x lte highnumber; x=x+1){ sb_filler.append(chr(x)); } </cfscript> <cfoutput> <h2>Java: #GetTickCount() - start#</h2> </cfoutput> <cfset start = GetTickCount()> <cfscript> tempArray = ArrayNew(1); for(x=0; x lte highnumber; x=x+1){ ArrayAppend(tempArray,chr(x)); } s_filler = ArrayToList(tempArray,""); </cfscript> <cfoutput> <h2>Array: #GetTickCount() - start#</h2> #Compare(sb_filler.toString(), s_filler)# </cfoutput> More examples of the speed difference between strings and arrays are in the archives. Jochem ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~| 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
