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Thread: 6.2 Grid Scrolling Performance

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  1. #1
    Sencha Premium User
    Join Date
    Jul 2015

    Default 6.2 Grid Scrolling Performance

    ExtJS Version: - Classic
    Tested on Win7: Firefox 53, Chrome 58, IE 11

    I have an issue with grids with large amounts of data and a widgetcolumn. The problem occurs if the widget is being hidden/shown based on a value in the record.

    • Scrolling with the mousewheel is very laggy
    • Dragging the scrollbar causes the data in the grid to disappear and the scrollbar jumps up and down as you drag
    • After enough scrolling the widgets will not be visible at all

    The same fiddle has no issues when run under ExtJS

  2. #2
    Sencha Premium User evant's Avatar
    Join Date
    Apr 2007
    Sydney, Australia


    It seems as though the call to hide/show is triggering a layout. In the interim you could just poke the element directly:

    Twitter - @evantrimboli
    Former Sencha framework engineer, available for consulting.
    As of 2017-09-22 I am not employed by Sencha, all subsequent posts are my own and do not represent Sencha in any way.

  3. #3
    Sencha Premium User
    Join Date
    Jul 2015


    Excellent, that works well. Thanks!

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