I heard Axel Mittendorf said: > Hi, what is the most efficient way to display a big text in a pyqt > app? Did you try to set the QTextEdit widget in LogText mode? t=QTextEdit() t.setTextFormat(QTextEdit.LogText) You may also want to turn undo/redo off: t.setUndoRedoEnabled(False) How much better is the memory consumption with this? -- S.