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Thread: [Performance]IE 11 performance is poor in comparison to Google Chrome using ExtJS 4.x

  1. #1
    Sencha User
    Join Date
    Sep 2015
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    1

    Default [Performance]IE 11 performance is poor in comparison to Google Chrome using ExtJS 4.x

    We used ExtJS 4.0.0.203. The experience with IE is noticeably slower than Chrome. Has anyone experienced the same performance difference with different browsers? Is Chrome a preferred browser for ExtJS? With the latest ExtJS 6, will the performance being improved generally?
    Appreciate your response.

  2. #2
    Ext JS Premium Member
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    Sep 2009
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    Cypress, Kalifornia
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    307

    Default yes, but...

    If you're on 4.0.x then you should upgrade. Sencha made some performance improvements with the 4.2.x versions. We're on 4.2.2 and the grid and tree were much improved on both Chrome and IE 11.

  3. #3

    Default

    Am using Ext 6.2.0, our app works fine in chrome but in IE11 it takes double the time for same screen loading..

  4. #4
    Sencha Premium User
    Join Date
    Dec 2016
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    2

    Default

    We are facing this issue too. Both initial load time and scrolling is way too slow in IE. We inspected the page in IE vs Chrome and IE seems to firing way too may events on scrolling compared with Chrome. Precisely IE is firing "focus" events which Chrome does not fire.

  5. #5

    Default

    We are also experiencing this issue and using Ext 6.5.3. If any one have any idea what can solve this?

    Our forms vertical scrolling gets very slow, very bad scroll lag there in IE11.

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