title: how to fix xamarin form listview lag when itemsource are image
body: <p>how to fix xamarin form listview lag when itemsource are image.
  Image are come for folder path i am using FFimageloading for image display</p>
  
  <pre><code>
   &lt;ffimageloading:CachedImage Aspect="AspectFill"
                               HorizontalOptions="FillAndExpand"
                               VerticalOptions="FillAndExpand"
                               BitmapOptimizations="True"
                               DownsampleToViewSize="True"
                               DownsampleUseDipUnits="True"
                               CacheDuration="80"
                               CacheType="Memory"  
                               LoadingPlaceholder="ic_timer"
                               ErrorPlaceholder="ic_spare_active"
                               Source="{Binding DocumentUrl}"&gt;
  
  &lt;ffimageloading:CachedImage.Triggers&gt;
        &lt;DataTrigger Binding="{Binding IsAddDocumentItem}"
                     TargetType="ffimageloading:CachedImage"
                     Value="True"&gt;
  
         &lt;Setter Property="IsVisible" Value="False"/&gt;
  
        &lt;/DataTrigger&gt;
  
  &lt;/ffimageloading:CachedImage.Triggers&gt;
  
  &lt;/ffimageloading:CachedImage&gt;
  </code></pre>