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Thread: 6.2 Grid Scrolling Performance

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  1. #1
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    Default 6.2 Grid Scrolling Performance

    ExtJS Version: 6.2.1.167 - Classic
    Tested on Win7: Firefox 53, Chrome 58, IE 11
    Fiddle: https://fiddle.sencha.com/#view/editor&fiddle/1v52

    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.

    Issues:
    • 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 6.0.1.250

  2. #2
    Sencha Premium User evant's Avatar
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    Default

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

    Code:
    widget.el.setDisplayed(show);
    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
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    Default

    Excellent, that works well. Thanks!

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