Paul: The links worked much better.
Couple of things: I'm guessing you are overriding addEventListener somewhere and adding the children to a dictionary. Unless you monkey-patched UIComponent, you might have missed an addEventListener call that could be important, but on the other hand, addEventListeners on display object rarely cause memory leaks. It is the addEventListener to a Timer or the stage that cause the leaks. The object being "listened to" grabs a reference to the object receiving the event. So it isn't clear you are monitoring the right thing. Also, any attempt to walk EVERY child of a Flex display object has to take into account the "chrome". Look at something like FocusManager to see a tree walk. You have to use "rawChildren" in some cases to get every child. The Dictionary is not weak-reference so anything added to the dictionary is stuck if it isn't later cleared and the tree walk seems to only want to clear things with "id" properties. Because the tree itself is disassembled via removeChild/removeElement then if one display object is stuck, then all of the tree is stuck. IMO, you don't really need to go through all of this work. I would first try to disassemble the tree where it is easy to do so. In general it is hard because a parent often has property references to the child, but the more you disassemble the tree (by calling removeChild/removeElement and setting property references to null) then it can be easier to see in the profiler what is still being referenced by a "GC root". HTH, -Alex On 2/1/19, 10:39 AM, "Paul Stearns" <[email protected]> wrote: Alex: I will try two things Here is a link to the clearModuleEvents and related code; https://na01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fhastebin.com%2Fgiqohitado.js&data=02%7C01%7Caharui%40adobe.com%7Cc6b81fa1950b49b2e47808d6887491cd%7Cfa7b1b5a7b34438794aed2c178decee1%7C0%7C0%7C636846431574848391&sdata=4yJTgC%2BrfDYl%2BeDVHgZKMGiHsAv1aO4V3Kf5jXy0gdk%3D&reserved=0 Here is a link to the clearEvents and related code; https://na01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fhastebin.com%2Farilidifol.cs&data=02%7C01%7Caharui%40adobe.com%7Cc6b81fa1950b49b2e47808d6887491cd%7Cfa7b1b5a7b34438794aed2c178decee1%7C0%7C0%7C636846431574848391&sdata=mndTTfrpeN1gXD0Y69BYuhgs84kapXy0M8JEM8gevgU%3D&reserved=0 Here is the clearModuleEvents code pasted differently; public function clearModuleEvents(mdlModule:UIComponent):void { trace('Starting clearModuleEvents') for(var idx:int = mdlModule.numChildren - 1; idx >= 0; idx--) { trace('idx=' + idx + ' isContainer(objChild)=' +isContainer(objChild) + ' isContainer(mdlModule.getChildAt(idx))=' + isContainer(mdlModule.getChildAt(idx))); var objChild:DisplayObject = mdlModule.getChildAt(idx); trace('flash.utils.getQualifiedClassName(objChild)=' + flash.utils.getQualifiedClassName(objChild)); var childContainer:DisplayObjectContainer = objChild as DisplayObjectContainer; clearChildEvents(childContainer); childContainer = null; if ("clearEvents" in objChild) { var fncClearEvents:Function = objChild["clearEvents"]; if (objChild.hasOwnProperty('id')) trace('Clearing Events in==>>' + objChild['id']); fncClearEvents(); fncClearEvents = null; } if ("dataProvider" in objChild)objChild["dataProvider"] = null; if ("selectedIndex" in objChild)objChild["selectedIndex"] = -1; if ("selectedItem" in objChild)objChild["selectedItem"] = null; if ("value" in objChild)objChild["value"] = null; if ("text" in objChild)objChild["text"] = null; objChild = null; } objChild = null; trace('Finished clearModuleEvents') } private function clearChildEvents(dpsContainer:DisplayObjectContainer):void { for(var idx:int = dpsContainer.numChildren - 1; idx >= 0; idx--) { var objChild:DisplayObject = dpsContainer.getChildAt(idx); if (isContainer(objChild)) { var childContainer:DisplayObjectContainer = objChild as DisplayObjectContainer; clearChildEvents(childContainer); childContainer = null; } if ("killMe" in objChild) { var fncKillMe:Function = objChild["killMe"]; if (objChild.hasOwnProperty('id')) trace('Killing Events in==>>' + objChild['id']); fncKillMe(); fncKillMe = null; } else if ("clearEvents" in objChild) { var fncClearEvents:Function = objChild["clearEvents"]; if (objChild.hasOwnProperty('id')) trace('Clearing Events in==>>' + objChild['id']); fncClearEvents(); fncClearEvents = null; } if ("dataProvider" in objChild)objChild["dataProvider"] = null; if ("selectedIndex" in objChild)objChild["selectedIndex"] = -1; if ("selectedItem" in objChild)objChild["selectedItem"] = null; // if ("value" in objChild)objChild["value"] = null; if ("text" in objChild)objChild["text"] = null; objChild = null; } objChild = null; } ---------------------------------------- From: Alex Harui <[email protected]> Sent: 2/1/19 1:20 PM To: "[email protected]" <[email protected]>, "[email protected]" <[email protected]> Subject: Re: instances of objects magically appear... It was hard to read the code in the email. In the future, try using pastebin or some other service, or open a JIRA issue and put the code in there. I think I saw that a Dictionary was holding the children but it isn't a weak-reference dictionary, so that could pin those children in memory. HTH, -Alex On 2/1/19, 10:16 AM, "Paul Stearns" wrote: I am trying to solve my memory leak issue. I have added a clearEvents function to my testing modules. My thought is to execute this function prior to unloading each module. Towards that end I have created a function in the parentApplication called clearModuleEvents which recursively loops through each child, and if the "clearEvents " function exists, run it. Then I unload the module. Using the profiler when I execute clearModuleEvents, it seems to create another instance of each display object. I am not sure why. I would appreciate if someone might tell what might cause that. Here is the code referenced above; clearEvents & related code; protected var dctListeners:Dictionary = new Dictionary(); override public function addEventListener(type:String, listener:Function, useCapture:Boolean = false, priority:int = 0, useWeakReference:Boolean = true):void { var key:Object = {type: type, useCapture: useCapture}; if (dctListeners[key]) { removeEventListener(type, dctListeners[key], useCapture); dctListeners[key] = null; } dctListeners[key] = listener; super.addEventListener(type, listener, useCapture, priority, useWeakReference); } public function clearEvents():void { trace('TestMemoryLeak clearEvents'); try { for (var key:Object in dctListeners) { removeEventListener(key.type, dctListeners[key], key.useCapture); dctListeners[key] = null; } } catch (e:Error) { trace('TestMemoryLeak clearEvents error='+e.message); } dctListeners = null; } clearModuleEvents and related code public function clearModuleEvents(mdlModule:UIComponent):void { trace('Starting clearModuleEvents') for(var idx:int = mdlModule.numChildren - 1; idx >= 0; idx--) { trace('idx=' + idx + ' isContainer(objChild)=' +isContainer(objChild) + ' isContainer(mdlModule.getChildAt(idx))=' + isContainer(mdlModule.getChildAt(idx))); var objChild:DisplayObject = mdlModule.getChildAt(idx); trace('flash.utils.getQualifiedClassName(objChild)=' + flash.utils.getQualifiedClassName(objChild)); var childContainer:DisplayObjectContainer = objChild as DisplayObjectContainer; clearChildEvents(childContainer); childContainer = null; if ("clearEvents" in objChild) { var fncClearEvents:Function = objChild["clearEvents"]; if (objChild.hasOwnProperty('id')) trace('Clearing Events in==>>' + objChild['id']); fncClearEvents(); fncClearEvents = null; } if ("dataProvider" in objChild)objChild["dataProvider"] = null; if ("selectedIndex" in objChild)objChild["selectedIndex"] = -1; if ("selectedItem" in objChild)objChild["selectedItem"] = null; if ("value" in objChild)objChild["value"] = null; if ("text" in objChild)objChild["text"] = null; objChild = null; } objChild = null; trace('Finished clearModuleEvents') } private function clearChildEvents(dpsContainer:DisplayObjectContainer):void { for(var idx:int = dpsContainer.numChildren - 1; idx >= 0; idx--) { var objChild:DisplayObject = dpsContainer.getChildAt(idx); if (isContainer(objChild)) { var childContainer:DisplayObjectContainer = objChild as DisplayObjectContainer; clearChildEvents(childContainer); childContainer = null; } if ("killMe" in objChild) { var fncKillMe:Function = objChild["killMe"]; if (objChild.hasOwnProperty('id')) trace('Killing Events in==>>' + objChild['id']); fncKillMe(); fncKillMe = null; } else if ("clearEvents" in objChild) { var fncClearEvents:Function = objChild["clearEvents"]; if (objChild.hasOwnProperty('id')) trace('Clearing Events in==>>' + objChild['id']); fncClearEvents(); fncClearEvents = null; } if ("dataProvider" in objChild)objChild["dataProvider"] = null; if ("selectedIndex" in objChild)objChild["selectedIndex"] = -1; if ("selectedItem" in objChild)objChild["selectedItem"] = null; // if ("value" in objChild)objChild["value"] = null; if ("text" in objChild)objChild["text"] = null; objChild = null; } objChild = null; }
