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      Description

      There seems to be a performance issue with the listbox in ZK 8.6.0. After migration from 8.5.0 IE11 is waiting about three minutes for a response, so I have to abort the JavaScript executing. With Chrome the listbox is loaded after 10 seconds. The listbox consists of about 50 elements.
      The performance is getting better if I

      • avoid images in the listcell
      • avoid autopaging
      • avoid apply tags within the listbox.
        Please check the attached file for more information.

      After some profiling with Chrome developer tools I could find out that the cause has something to do with the JS function doSyncScroll.

      1. listbox.zul
        3 kB
        vhandle
      1. performance.PNG
        79 kB

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              vhandle vhandle
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