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  1. Qt
  2. QTBUG-66714

QTreeView::isFirstColumnSpanned becomes slow due to O(n) complexity.

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    • Icon: Bug Bug
    • Resolution: Done
    • Icon: P3: Somewhat important P3: Somewhat important
    • 5.12.0 Alpha
    • 5.10.0
    • Widgets: Itemviews
    • None

      The code for QTreeView::isFirstColumnSpanned() performs a linear loop through all view items spanningIndexes to determine if the row has the 'spanning' flag set. This makes expand() and layout() operations very slow on models with many rows.

        For Gerrit Dashboard: QTBUG-66714
        # Subject Branch Project Status CR V
        222057,2 QTreeView: speedup isFirstColumnSpanned/setFirstColumnSpanned dev qt/qtbase Status: MERGED +2 0

            chehrlic Christian Ehrlicher
            antrag Anton Ragnarsson
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              Created:
              Updated:
              Resolved:

                There are no open Gerrit changes