zkoss/zk

<zk>
    <label multiline="true">
        1. Rapidly click the "switch" buttons.
        2. It should be fast.
    </label>
    <window apply="org.zkoss.bind.BindComposer" viewModel="@id('vm') @init('org.zkoss.zktest.bind.basic.PerformanceVM')">
        <button id="btnSwitch" label="switch" onClick="@command('switchCase')"/>
        <hbox>
            <label value="@load(vm.count)"/>
            <label value="@load(vm.src1)"/>
            <label value="@load(vm.src2)"/>
        </hbox>
        <include src="@load(vm.src1)"/>
        <include src="@load(vm.src2)"/>
        
    </window>

</zk>