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Thread: Combo box very slow to display large list in 4.2.0

  1. #1
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    Default Combo box very slow to display large list in 4.2.0

    I am using the latest download...4.2.0

    Combo box has about 6000 entries in list.

    The time to display list after clicking button is now about 9 seconds.

    With ExtJS 2 it is about 3 seconds for the same field and list.

    Question: Is there any tweak to improve the performance in 4.2.0?

    Thanks

  2. #2
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    use a buffered store in that case. it will only fetch x amount of records at a time and once they scroll down it would fetch the next X number of records

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    That doesn't work.... yet

    Specify a pageSize on the ComboBox, and it will use a PagingToolbar to page the data.
    Longtime Sencha geek. Outspoken advocate of pure Javascript Views. Posts my own opinions.

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    But 3 times slower is not good. There must be something wrong. Maybe it's doing layouts?

    I'll have to test it.
    Longtime Sencha geek. Outspoken advocate of pure Javascript Views. Posts my own opinions.

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    It is faster in Chrome...3 secs. compared to 9+ secs in Firefox, about 60 secs in IE.

    9249 records in store

    queryMode:"local"

    This is a serious problem...our users only run IE or firefox.

    Should I go back to an older version, or is there likely to be a fix forthcoming?

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    I have gone back to 4.1.1...

    Firefox time is back to about 5 seconds, IE is 30+ seconds on the first display, then 9-10 seconds for subsequent attempts.

    So 4.1.1 is slightly better than 4.2.0, but still much worse then 2.x.

    Can this be fixed?

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    I have developed a picker component that uses a regular grid instead of the default combo box list. That means you can use a buffered grid, and that renders way faster than the combo.

    You can get it on github.

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    Default Combo Box with large data to display . I'm using Extjs 3.4

    Please help me how to find below:

    This is an IE specific issue when the drop down box has a large number of records (more than 100), it takes too long to open the drop down.

    I'm using extjs 3.4

    Regards,
    Santhosh M

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