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Thread: ExtJs 4 - SLOW AS HELL

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    Due to the impact related to this issue, we have to defer this issue to the next major or minor release.
  1. #1
    Sencha User
    Join Date
    Mar 2011
    Posts
    6

    Exclamation ExtJs 4 - SLOW AS HELL

    ExtJs 4.0.2 - problem solved.. tnx to Sencha Dev team!

    -------------------------------------------

    First of all, i want to tell that i love ExtJS. It's coolest framework i ever seen in my entire life

    But..

    ExtJs 4 (4.0.1) is SLOW AS HELL! Much more slower that ExtJs 3 (3.3.3).
    I made an example app, to prove that i'm right. Nested grid with 50 records in local Store.

    Code:
     
    //start point
     Ext.onReady(function () 
    {
        Ext.create('Ext.Viewport', 
        {
         layout: 
         'fit',
         padding: 8,
         items: 
         [{
         items: 
         [{
         items: 
         [{
         items: 
         [{
         items: [{
             xtype: 'gridpanel',
             store: MainStore,
             columns: 
             [{
                 text: 'ID',
                 dataIndex: 'id',
                 width: 50
             },{
                 text: 'Name',
                 dataIndex: 'name',
                 flex: 1
             },{
                 text: 'Partner',
                 dataIndex: 'partner',
                 flex: 2
             },{
                 text: 'Address',
                 dataIndex: 'address',
                 flex: 1
             },{
                 text: 'City',
                 dataIndex: 'city',
                 flex: 1
             },{
                 text: 'State',
                 dataIndex: 'state',
                 width: 50
             }]
        }]
        }]
        }]
        }]
        }]
    });
    });
    Firefox 3.6.17
    ExtJs 4.0.1 - 10 seconds to load grid!!! (local store)
    ExtJs 3.3.3 - less then 1 second (local store)

    10 times slower!!! o_O

    IE9
    ExtJs 4.0.1 - 1 second (local store)
    ExtJs 3.3.3 - less then 1 second (local store)

    almost 2 times slower!!!

    Chrome
    ExtJs 4.0.1 - 1 second (local store)
    ExtJs 3.3.3 - less then 1 second (local store)

    almost 2 times slower!!!

    VIDEO: http://cid-a1de71e9f2ae2f82.office.l...2016.49.50.wmv
    (slow one is ExtJs 4.0.1)

  2. #2
    Sencha User
    Join Date
    Oct 2010
    Posts
    17

    Default

    +1 of course, but the subject is being discussed here:

    http://www.sencha.com/forum/showthre...-to-extjs-3%29

  3. #3
    Ext JS Premium Member stevil's Avatar
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    Nov 2007
    Location
    Denver, CO
    Posts
    1,045

    Default

    +1 on both your points. It's starting to look like next patch (4.0.2) will drop soon... poster in another thread looked at the extjs version that the doc site is using, and it says 4.0.2...

    stevil

  4. #4
    Ext JS Premium Member
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    UK
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    Default

    Yep, looks like 4.0.2 is almost here. I have faith in the EXTJS dev team that they will get the performance issues sorted soon. 4.x's future is dependant on them fixing the issues and incentives don't come bigger than that!

  5. #5
    Ext JS Premium Member stevil's Avatar
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    Denver, CO
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    Default

    Quote Originally Posted by MrSparks View Post
    Yep, looks like 4.0.2 is almost here. I have faith in the EXTJS dev team that they will get the performance issues sorted soon. 4.x's future is dependant on them fixing the issues and incentives don't come bigger than that!
    Definitely agree with you that they'll fix the issues - it's just a little frustrating, because in order to get good information (from Ed, Jacky, etc.), you have to know EXACTLY which threads to subscribe. I'd really love to see them start a sticky status thread where devs, architects, managers, etc., can let us know in one place about progress, major issues that are being worked, etc.

    stevil

  6. #6
    Sencha User
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    Location
    Germany
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    198

    Default

    Saw the thread with the 4.0.2 informations too and was wondering why I missed the new release.

    Devs are working on new Sencha Touch version or whatever. No one is tagging reported and confirmed bugs or helping the users just one bit. The forum is completely overrun with open, unanswered questions. No structure in the forum and any kind of response in several very important threads (like the performance threads). Don't know if this is a good way to go...

  7. #7
    Sencha User
    Join Date
    Jun 2011
    Location
    India
    Posts
    38

    Default extjs 4 is very slow

    I also found the same problem. I am using extjs 4.0.7 and it is verymuch slower in firefox

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