title: Is there any solution for the QtWebKit memory leak?
body: <p>Memory size of QtWebKit process increases with every new page load. Cleaning memory cache doesn't help. Does anyone know how to solve it?</p>
  
  <p>This simple example crashes after some time of operation:</p>
  
  <pre><code>from PyQt5.QtCore import QUrl
  from PyQt5.QtWidgets import QApplication
  from PyQt5.QtWebKitWidgets import QWebView
  from PyQt5.QtWebKit import QWebSettings
  
  class Crawler(QWebView):
      def __init__(self):
          QWebView.__init__(self)
  
          self.settings().setMaximumPagesInCache(0)
          self.settings().setObjectCacheCapacities(0, 0, 0)
          self.settings().setOfflineStorageDefaultQuota(0)
          self.settings().setOfflineWebApplicationCacheQuota(0)
          self.settings().setAttribute(QWebSettings.AutoLoadImages, False)
  
          self.loadFinished.connect(self._result_available)
  
      def start(self):
          self.load(QUrl('http://stackoverflow.com/'))
  
      def _result_available(self, ok):
          print('got it!')
  
          self.settings().clearMemoryCaches() # it doesn't help
          self.settings().clearIconDatabase()
  
          self.start() # next try
  
  if __name__ == '__main__':
      app = QApplication([])
      crawler = Crawler()
      crawler.start()
      app.exec_()
  </code></pre>