[PyQt] Memory Leak on findChild
Anthony.Hayward at sagentia.com
Tue Sep 5 15:21:50 BST 2017
New PyQt5 user here.
I was hoping someone could let me know if I'm doing something wrong, or if I've found a bug in PyQt5?
In my full application, every time findChild() is called on the view, the application uses more memory. Here's a simple example that replicates the issue:
import QtQuick 2.0
width: 100; height: 100;
from PyQt5.QtQuick import QQuickView
from PyQt5.QtGui import QGuiApplication
from PyQt5.QtCore import QUrl, QObject, QTimer, pyqtSlot
def __init__(self, view):
""" Initialise the controller """
self._view = view
# Create timer loop to update the screen for text
self._updateLoopTimer = QTimer()
for _ in range(1000):
thing = self._view.findChild(QObject, "aChildThatDontExist")
if __name__ == '__main__':
# Create main app
app = QGuiApplication(sys.argv)
view = QQuickView()
ctrl = Controller(view)
# Wait till app closed
# Exit this Python application
It doesn't seem to matter whether I call findChild() for an object that does or doesn't exist. The example above uses a bit under 400kB of memory a second.
Any help would be appreciated.
Thanks in advance,
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