[Laszlo-user] datacombobox data binding very slow

[mt1]

I have just found this jira.

http://www.openlaszlo.org/jira/browse/LPP-2719

Are there any workaround ?

Thanks,
mt1

mt1 wrote:

>Hi forks,
>
>I have a trouble on datacombobox performance.
>
>I use some own components that is extended with datacombobox.
>The attachment is the sample.
>You can see how slow binding data in datacombobox.
>This is a tiny code but it take over 1 second to bind data.
>In fact, i use a ton of datacombobox in a view, so this *slow binding*
>became big trouble on my apps.
>
>Are there any workaround of it ?
>It works on below environment.
>Windows XP, Pen4 2GHz, 2GBmem
>OL3.3.3, FireFox 2.0, Flash Player v9
>
>Thanks,
>mt1
>  
>
>------------------------------------------------------------------------
>
><?xml version="1.0" encoding="UTF-8" ?>
><canvas debug="true">
>	<script>
>		var startTime = 0;
>		var endTime   = 0;
>	</script>
>	
>	<dataset name="dumlist">
>		<resultset />
>	</dataset>
>	
>	<dataset name="dlist">
>		<resultset>
>			<d name="[Choose..]" value="0"/>
>			<d name="AA" value="1"/>
>			<d name="BB" value="2"/>
>			<d name="CC" value="3"/>
>			<d name="DD" value="4"/>	
>		</resultset>
>	</dataset>
>
>	<dataset name="d">
>		<resultset>
>			<dd	attr1="1" attr2="2" attr3="3" attr4="4" attr5="5"
>			 	attr6="6" attr7="7" attr8="8" attr9="9" attr10="10" />
>		</resultset>
>	</dataset>
>
>	<class name="dcom" extends="datacombobox" selectfirst="true" textdatapath="@name" valuedatapath="@value">
>		<attribute name="defaultvalue" value="-1" />
>		
>        <handler name="ondata" args="val">
>			if( val == null ){
>				_updateSelectionByIndex(0,false,true);
>				this.selectItemAt(0);
>			}
>        </handler>
>	</class>
>	
>	<simplelayout axis="x"/>
>	<view name="vform" layout="axis:y" datapath="d:/resultset/dd">
>		<edittext name="attr1" datapath="@attr1"/>
>		<edittext name="attr2" datapath="@attr2"/>
>		<edittext name="attr3" datapath="@attr3"/>
>		<edittext name="attr4" datapath="@attr4"/>
>		<edittext name="attr5" datapath="@attr5"/>
>		
>        <dcom name="dl" datapath="@name" itemdatapath="dlist:/resultset/d" defaultvalue="0" />
>        <dcom name="d2" datapath="@name" itemdatapath="dlist:/resultset/d" defaultvalue="0" />
>        <dcom name="d3" datapath="@name" itemdatapath="dlist:/resultset/d" defaultvalue="0" />
>        <dcom name="d4" datapath="@name" itemdatapath="dlist:/resultset/d" defaultvalue="0" />
>        <dcom name="d5" datapath="@name" itemdatapath="dlist:/resultset/d" defaultvalue="0" />
>        <dcom name="d6" datapath="@name" itemdatapath="dlist:/resultset/d" defaultvalue="0" />
>        <dcom name="d7" datapath="@name" itemdatapath="dlist:/resultset/d" defaultvalue="0" />
>        <dcom name="d8" datapath="@name" itemdatapath="dlist:/resultset/d" defaultvalue="0" />
>        <dcom name="d9" datapath="@name" itemdatapath="dlist:/resultset/d" defaultvalue="0" />
>        <dcom name="d10" datapath="@name" itemdatapath="dlist:/resultset/d" defaultvalue="0" />
>
>		<handler name="ondata">
>      		var dt  = new Date();
>	        endTime = dt.getTime();
>			var dt = endTime - startTime;
>			Debug.write( "take time: " + dt/1000 + "[sec]" );
>		</handler>
>	</view>
>	
>	<view name="buts" layout="axis:x">
>		<button> Init
>			<handler name="onclick">
>               	var dt = new Date();
>               	startTime = dt.getTime();
>				parent.parent.vform.setDatapath( "dumlist:/" );
>			</handler>
>		</button>
>
>		<button> Bind
>			<handler name="onclick">
>               	var dt = new Date();
>               	startTime = dt.getTime();
>				parent.parent.vform.setDatapath( "d:/resultset/dd" );
>			</handler>
>		</button>
>	</view>
></canvas>
>

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