[Laszlo-user] v4.3.0 create instance is slow than v3.3.3

[ono keiji]

Thank you, Tucker.
It became clear to me.

Ono Keiji
ono at net8.co.jp


P T Withington さんは書きました:
> When we moved from single platform to multiple platform, we removed many 
> optimizations to first get a working system.
> 
> v3 was highly tuned for Actionscript 2 (swf5/6/7/8), but we had to tear 
> a lot of internals apart and rebuild them with more layers of 
> abstraction to add support for Javascript (DHTML) and Actionscript 3 
> (swf9).  The cost was is lost performance, especially in swf8, where 
> much of the Class support is implemented at run time (rather than at 
> compile time as in swf9).  We think this was the right decision, because 
> we expect swf9 and ECMAScript 5 to have better and better class support 
> and to become more popular.
> 
> We are now doing a lot of tuning to try to improve the performance of 
> the system on all platforms.
> 
> This is related to http://jira.openlaszlo.org/jira/browse/LPP-6599 which 
> is a long-standing issue that we continue to work on.
> 
> On 2009-05-07, at 03:45EDT, ono keiji wrote:
> 
>> I did the instance create test on v3.3.3 and v4.3.0.
>> Surprisingly v4.3.0 was slow than v3.3.3.
>> Why dose it?
>>
>> [Test Case]
>> By using the attachment and take their mean time [msec].
>>
>> [Result]
>> On Windows FireFox v3.0
>>     v.3.3.3  v4.3.0
>> swf8  733     4,103
>> swf9   -        910
>> swf10  -        893
>>
>> On Windows IE7
>>     v.3.3.3  v4.3.0
>> swf8  488     3,257
>> swf9   -        571
>> swf10  -        698
>>
>>
>>
>> Ono Keiji
>> ono at net8.co.jp
>> <?xml version="1.0" encoding="UTF-8"?>
>> <canvas debug="true">
>>     <script>
>>         var t1 = new Date();
>>         var st = t1.getTime();
>>     </script>
>>
>>     <class name="myLabel">
>>         <attribute name="label" type="string"/>
>>         <attribute name="labelx"/>
>>         <attribute name="labely"/>
>>        
>>         <text text="${classroot.label}" x="${classroot.labelx}" 
>> y="${classroot.labely}"/>
>>         <edittext width="200" x="50" y="${classroot.labely}"/>
>>     </class>
>>     
>>     <class name="Win" extends="window" x="250" y="0" width="300" 
>> height="250" title="Win">
>>         <myLabel name="label1" label="${this.name}" labelx="10" 
>> labely="20"/>
>>         <myLabel name="label2" label="${this.name}" labelx="10" 
>> labely="50"/>
>>         <myLabel name="label3" label="${this.name}" labelx="10" 
>> labely="80"/>
>>         <myLabel name="label4" label="${this.name}" labelx="10" 
>> labely="110"/>
>>         <myLabel name="label5" label="${this.name}" labelx="10" 
>> labely="140"/>
>>     </class>
>>
>>     <handler name="oninit">
>>         <![CDATA[
>>         for( var i=0; i<10; i++){
>>             var w = new lz.Win();
>>         }
>>        
>>         var t2 = new Date();
>>         var et = t2.getTime();
>>         var dt = et - st;
>>         Debug.write( "init time[ms]: ", dt );
>>         ]]>
>>     </handler>
>> </canvas>   
>