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Thread: beginRemoveRows and endRemoveRows very slow with large data sets.

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  1. #1
    Join Date
    Sep 2010
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    Default beginRemoveRows and endRemoveRows very slow with large data sets.

    I have a table model created from QAbstractTableModel and it works fine with small amounts of data less then 1000. I have certain cases where I can have over 32,000 rows in a table. When I make a call to beginRemoveRows and endRemoveRows it takes over 10 milliseconds for the call to complete. Why is it taking so long? Is there any way I can speed this up?

  2. #2
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    Default Re: beginRemoveRows and endRemoveRows very slow with large data sets.

    Tip 1:
    Use setUpdatesEnabled on the widget showing the model. Set it to false before changing the model and to true after changing.

    Tip 2:
    Set uniform row heights to true (if possible for your situation)

    Question:
    What are you using to view the table? A QTableView?

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