[Laszlo-dev] A major performance problem with sendBehind

[Sarah Allen]

The sendBehind call is definitely slow.  You should just create the text 
views in the order you want them to be.

Sarah

Asger Alstrup wrote:

> Hi,
>
> The attached program becomes slower and slower when you click on it. 
> If you uncomment the sendBehind call, things are fine.
>
> Any ideas for how to solve this?
>
> Regards,
> Asger Ottar Alstrup
>
>------------------------------------------------------------------------
>
><canvas height="80%" width="100%">
>  <view width="100%" height="100%">
>    <method event="oninit">
>      build();
>    </method>
>
>    <method name="build"><![CDATA[
>      var start = (new Date).getTime();
>      this.v = new Array();
>      for (var i = 0; i < 100; ++i) {
>        var topic = new LzText(this, { 
>                                x: Math.floor(i / 10) * 30, 
>                                y: (i % 10) * 10 + 150, 
>                                text: i } );
>        this.v[i] = topic;
>              
>        if (i > 0) {
>	      // This slows following refreshes down tremendously:
>          this.v[i].sendBehind(this.v[i - 1]);
>        }
>      }
>      Debug.write("Build took " + ( (new Date).getTime() - start) );
>    ]]></method>
>    
>    <method event="onclick"><![CDATA[
>      var start = (new Date).getTime();
>      for (var i = 0; i < 100; ++i) {
>        this.v[i].destroy();
>      }
>      Debug.write("Destroy took " + ( (new Date).getTime() - start) );
>
>      build();
>    ]]></method>
>  </view>
></canvas>
>  
>
>------------------------------------------------------------------------
>
>_______________________________________________
>Laszlo-dev mailing list
>Laszlo-dev at openlaszlo.org
>http://www.openlaszlo.org/mailman/listinfo/laszlo-dev
>  
>