I'm seeing a major memory leak with table destruction, in 0.7.2 In our qooxdoo application we have a viewer which instantiates a handler for particular types of objects. The handler is in charge of displaying the object. The viewer disposes and instantiates a new handler when the object selection changes.
In a common case, the handler uses a table object (with our own remote data model and custom row and cell renderers). When changing viewed objects we're seeing a considerable memory leak, of the order of 1.3MB in IE7. I modified qx.dev.ObjectSummary.getInfo to show a delta - i.e. only those object types which increased in count were shown in the report. This revealed that there were three objects not being disposed when the table object was disposed: 024625 DEBUG: abling.fragment.CViewer[608]: Summary: (1922 Objects) 1: qx.ui.table.pane.Model 1: qx.ui.table.columnmodel.Basic 1: qx.ui.table.selection.Model Taking qx.ui.table.selection.Model as an example, it is created in qx.ui.table.Table property newSelectionModel() and is stored in the Table property selectionModel. But there's no call to dispose it. If I add code in the Table destructor to dispose it (as well as removing the event listener) then it no longer appears in the list of objects. If I do this for the other objects they don't appear in the list of leaked objects. However, I still get memory increasing in IE which might be due to circular references. Some questions: 1. How are these objects supposed to be disposed? Have I misunderstood the mechanism for property destruction? 2. Under what circumstances is it necessary to call removeEventListener? It seems that there are circumstances in the code where it's not called. 3. Have other people seen problems in the table destruction or is our use not typical (regular instantiate - destruct)? Hugh ------------------------------------------------------------------------- Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://ad.doubleclick.net/clk;164216239;13503038;w?http://sf.net/marketplace _______________________________________________ qooxdoo-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/qooxdoo-devel
