ActionScript 3.0 is 5~7 times slower then ActionScript 2.0

I have a code that will translate this XML
quote:
<?xml version='1.0'?>
<Member>
<M>
<Username>Test 1</Username>
<Password>Test 1 Password</Password>
</M>
<M>
<Username>Test 2</Username>
<Password>Test 2 Password</Password>
</M>
<M>
<Username>Test 3</Username>
<Password>Test 3 Password</Password>
</M>
</Member>
Into this array
quote:
Array[0].Username = "Test 1"
Array[0].Password = "Test 1 Password"
Array[1].Username = "Test 2"
Array[1].Password = "Test 2 Password"
Array[2].Username = "Test 3"
Array[2].Password = "Test 3 Password"
Here is my variable declaration
quote:
var StartTime:Number = getTimer();
var EndTime:Number = getTimer();
var j:Number = 0;//This Variables used for ActionScript 3.0
Loop
var k:Number = 0;//This Variables used for ActionScript 3.0
Loop
Here is the XML String
quote:
var MyXMLString:String = "<?xml
version='1.0'?><member><O><member_id>1</member_id><currency_id>0</currency_id><name>Admin istrator</name><description>Account
Administrator</description><contact>-</contact><billing_info>-</billing_info><opening_pay able>0.0000000000</opening_payable><opening_receivable>0.0000000000</opening_receivable><t ype>STAFF</type><asset_chart_of_account_id>0</asset_chart_of_account_id><liability_chart_o f_account_id>0</liability_chart_of_account_id><staff_username>administrator</staff_usernam e><staff_password>21232f297a57a5a743894a0e4a801fc3</staff_password><staff_privileges>ADMIN </staff_privileges></O><O><member_id>1</member_id><currency_id>0</currency_id><name>Admini strator</name><description>Account
Administrator</description><contact>-</contact><billing_info>-</billing_info><opening_pay able>0.0000000000</opening_payable><opening_receivable>0.0000000000</opening_receivable><t ype>STAFF</type><asset_chart_of_account_id>0</asset_chart_of_account_id><liability_chart_o f_account_id>0</liability_chart_of_account_id><staff_username>administrator</staff_usernam e><staff_password>21232f297a57a5a743894a0e4a801fc3</staff_password><staff_privileges>ADMIN </staff_privileges></O><O><member_id>1</member_id><currency_id>0</currency_id><name>Admini strator</name><description>Account
Administrator</description><contact>-</contact><billing_info>-</billing_info><opening_pay able>0.0000000000</opening_payable><opening_receivable>0.0000000000</opening_receivable><t ype>STAFF</type><asset_chart_of_account_id>0</asset_chart_of_account_id><liability_chart_o f_account_id>0</liability_chart_of_account_id><staff_username>administrator</staff_usernam e><staff_password>21232f297a57a5a743894a0e4a801fc3</staff_password><staff_privileges>ADMIN </staff_privileges></O></member>";
var MyXML:XML = new XML(MyXMLString);//Parse the XML ONCE
I have a function called ConvertXML , and to check the
performance i made it loop every frame by calling the following
RunXML function
quote:
function RunXML(Events:Event){
StartTime = getTimer();
for(var i:Number=0;i<100;i++){
var MyXMLArr:Array = ConvertXML(MyXML, false, false);
EndTime = getTimer();
trace(EndTime - StartTime + " ms");
and here is my code for parsing the variable MyXML in
ActionScript 3.0 (ConvertXML function)
quote:
//Action Script 3.0 ConvertXML
import flash.xml.*;
function ConvertXML(RecvXML:XML, ChildBranch:Boolean,
IsTable:Boolean):Array {
var RowArr:Array = new Array();
for (j=0; j<RecvXML.child("*").length(); j++) {
var TempObject = new Object();
for (k=0; k<RecvXML.child("*")[j].elements("*").length();
k++) {
TempObject[RecvXML.child("*")[j].elements("*")[k].name()] =
RecvXML.child("*")[j].elements("*")[k];
RowArr.push(TempObject);
return RowArr;
addEventListener(Event.ENTER_FRAME, RunXML);
The code above run 5~7 times slower then the following
actionscript 2.0 code
quote:
//Action Script 2.0 ConvertXML
function ConvertXML(RecvXML:XML, ChildBranch:Boolean,
IsTable:Boolean):Array {
var RowArr:Array = new Array();
for (var aNode:XMLNode = RecvXML.firstChild.firstChild;
aNode != null; aNode=aNode.nextSibling) {
var TempRecord:Object = new Object();
for (var bNode:XMLNode = aNode.firstChild; bNode != null;
bNode=bNode.nextSibling) {
TempRecord[bNode.nodeName] = bNode.firstChild.toString();
RowArr.push(TempRecord);
return RowArr;
this.onEnterFrame = RunXML;
they both does exactly the same thing.. and yet the
actionscript 3.0 code run 5~7 TIMES SLOWER . why?
i have tried other benchmark, and it seems that actionscript
3.0 perform 10 to 100 TIMES FASTER then actionscript 2.0 , only for
this one it run slower... why?
I also attach all the code for actionscript 3.0
should you want to try the actionscript 2.0 , just uncomment
the ConvertXML and this.onEnterFrame for actionscript 2.0 and
comment the one for actionscript 3.0
Why? have i done something wrong?
Cheers and God Bless,
Chowi

Although this doesn't answer your specific question exactly,
it's worth noting that most of the time you do not need to convert
XML into an array or objects like it was helpful to do in AS2, as
XML is a native Object in AS3.
For instance, xml.M would give you an XMLList of logins that
would be treated the same was as your desired Array:
var logins:XMLList = xml.M;
trace(logins[0].Username) // "Test 1"
And that takes 0 milliseconds. ;) You can also declare you
XML directly in AS3, you do not need to declare it as a String and
parse it (see attached.)
Don't know what your trying to accomplish so that might not
help you, but I thought it was worth mentioning. I've been using
E4X extensively for the first time in a project and I have to say
that overall it's made life much easier for me.

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