ActionScript 3.0 :: Loader Instances And Memory Management?
Aug 18, 2009
Hi guys, I'm wondering whether any of you have any opinions on whether you instantiate a Loader into an instance variable, or whether you declare a local variable to hold the Loader object.
I'm coming at this from a memory management / garbage collection perspective.
I only need the Loader object to load the file and register the event listeners. So I don't really want an object-wide instance variable to hold this loader object (which is what Adobe does in most of their examples), since I can always access the loader.data through the event's target property.
I'm making an isometric game and I need to know which takes less memory for scrolling, making everything invisible that you can't see? Like if(!this.base.hitTest(worldHitter))this._visible = false; Or would it be better to remove the movieclips unseen and then reattach them when i should see them?
I previously asked about some FLV files that I was loading externally, and having trouble with memory being released. Having sort of solved this, I am having the same problem with loading external resources and then getting them to be cleared out of memory when I'm done with them. I have seen kglad mention more than once that GC in flash 9.0.124.0 is broken, but where does that leave us? I have also tried my project in FP 10, and the memory still continues to go up and up. If I load an external resource - in this case I have a class that builds a VR room with papervision - and then close it, set it's instance to null, my memory never goes down.
This is a total guess, but could it have anything to do with using Tweener in my project? Is there any way that the Tweener class could be keeping some of my objects in memory and keep them from being GC'd? I am using weak references in my listeners, setting any variable I can find to null... I can get over how frustrating this is to just see memory go up and up but find no reason. The class I am using also uses a few subclasses to build itself, but I end up with one instance of my VR on the stage. If I have set that instance to a name - myVR - and then removeChild(myVR) from the stage and set the name to null - that should do it right? Boy, this is frustrating.
I have done a lot of searching / reading to find out how to clear my memory. But I still can't really work out how to clear the memory, it just never seems to come down. I have a few MovieClips that contain other MovieClips with pngs inside them being added to the stage.
As fare as I can tell all Event listeners are removed and refrences I remove the clip, with removeChild I "null" the variable I am using the "LocalConnection()" hack to try and force a clean up, but no movement on the memory count. Are there any examples of a *.png being added and removed from the memory?
I was recently profiling my application that uses Degrafa States in the skins and noticed that doing so uses more memory than I expected. Between the SetProperty and State, they were using about 10% of the total used application memory.
Would it be better to use css for the state changes and a new skin for each state? or Are there some simple tips to reducing the memory footprint of degrafa?
the Flash Virtual Machine relies on garbage collection by using reference counting and mark and sweep (for good coverage of these topics, check out Grant Skinner's article and presentation). And yes, Flash also provides the "delete" operator, which can (unfortunately only) be used to remove the properties of dynamic objects.
What I want to know is how to make it so that Flash programs don't continue to consume CPU and memory while running in the background (save loading content or communicating remotely, for example). The motivation for this question comes in part from Apple's ban on cross compiled applications (in its SDK 4) on the grounds that they do not behave as predicted with the multitasking feature central to iPhone OS 4. My intention is not only to make Flash programs that will 'pass muster' as far as multitasking in iPhone OS 4, but also to simply make better (behaving) Flash programs.
Put another way, how might a Flash application mimic the multitasking feature of iPhone OS 4? Does the Flash API provide the means for a developer to put their applications to 'sleep' while other programs run, and then to 'awaken' them just as quickly?
In our own program, we might do something as crude as detecting when the user has been idle (no mouse motion or key press) for (say) four seconds:
var idle_id:uint = setInterval(4000, pause_program); var current_movie_clip:MovieClip; var current_frame:uint;
[code]....
what's the best way to detect that an application should be shelved? And, more importantly, is it possible for Flash Player to detect that some of its running programs are idle, and to similarly shelve them until the user performs an action to resume them?
I am a flex programmer but i had nothing to do for handle manage memory in my projects. I think lack of memory management is reason for loading lag of swf file. Can any one help me to how to handle manage memory in flex/ as3 codes.
I've been trying to figure out how Flash does its memory management regarding object declarations but haven't found anything that describes declarations themselves. [code]Basically I want a pool of declared variables that get instantiated only when a certain type is set. I'd have logic in other functions that figures out what the type is and then does certain things to it, but for now I just wanted to know what kind of memory management Flash does with something like this. Does it do nothing until I actually instantiate it (= new Object()) or will space be set aside once I simply declare it (someObj:Object)?
In AS3, after I've removed a display object container B from another display object container A and deleted all the references to B in A, does that mean that all memories previously held in B will all be released too or do I have to manually delete all the references to objects in B before I can delete B in A in order to free all the memory space held?One more question. I was kind of confused of when to use the delete statement and when to set a variable to null.
I'm developing an AS3 application which has some memory leaks I can't find, so I'd like to ask some newbie questions about memory management.Imagine I have a class named BaseClass, and some classes that extend this one, such as ClassA, ClassB, etc.I declare a variable:
myBaseClass:BaseClass = new ClassA();
After a while, I use it to instantiate a new object:
myBaseClass = new ClassB(); some time after
myBaseClass = new ClassC();
and the same thing keeps happening every x millis, triggered by a timer.Is there any memory problem here? Are the unused instances correctly deleted by the garbage collector?
This blog (and others) state that you should set object references to null inside your dispose() methods when cleaning up objects. However, Actionscript 3 (with Flash Player 9) uses mark and sweep to clear out circular references for you. So I am wondering: is there really any reason to null out your object references?
My AS3 application basically does the following (pseudo code from main application class) 3 or 4 times by adding custom objects to stage:
_movieClipClassVariable = new MyCustomSpriteSubclass(); _movieClipClassVariable.addEventListener(MyEvents.READY, function(event:Event):void { _hideLoading(); mcHolder.addChild(_movieClipClassVariable);}); _movieClipClassVariable.addEventListener(MouseEvent.CLICK, myClickHandler); private function coverClickHandler(event:Event):void { }
What is the right way to allow Garbage Collector to recycle _movieClipClassVariable after it is not necessary? Assign null to it? Remove all listeners? Use weak reference for listeners?
I have a question regarding AS3 memory management. Supposing I created an instance variable for a Class, in this case or type Sound: public class SoundStore extends Sprite{ var s:Sound; Then within various class functions I referenced this variable multiple times, each time I wanted to load in a new sound: s = new Sound(); Am I correct in thinking that each time I created a new Sound I would be overwriting the previous allocated memory?
im develloping an application for create a layout of advertising newspaper. the user can set the number of pages, and create rectangles represanting the adverts, then drag them and place them into the the representation of the page.the display list is as follow: on the main stage there is inputs textfields and a button that create the pages according to the number that the user typed.Then instances of the pages are created (MC Page in the lybrary exported for AS as Page and i have a class Page as well). Inside this clip Page i have my tools for create the rectangles and drag and place.....As well as the instances of my pages are created, button(1 for each Page) are also created. NOTE that Page and button are in the main stage My probleme is that i want my button to change the depth of is related page for it can be on top or alpha at 100% or the visibilty to true, but my button doesnt find the instance name of the pages at the export because they are not yet created.
I'm loading some images with Loaders, cloning the BitmapData to a new Bitmap, and adding the Bitmap as a child of a Sprite. So far, so good. I want the Loaders I'm using to be removed by garbage collection, which they seem to be. The problem, or so it seems, is that when the Loaders are cleaned up, the Bitmaps I'm creating lose their data.
Edit: All this is happening when a class is instanced, and many copies of this class are being used as actors in a game. As the Actors are being created the older ones are losing their BitmapData to garbage cleanup. When all of them are finally loaded, only the last few are visible. I've rewritten my posted code as a class. If I prevent the Loaders from being cleaned up by somehow keeping a reference to them, the Bitmaps don't lose the data, but I don't want these Loaders hanging around.
my understanding is that primitive types (uint, string, Number, etc.) of a class do not need to be set to null for garbage collection.
for example, i am not required to write this dispose() method in the following class:
package { //Imports import flash.display.Shape;
[Code]....
if this is true, which i believe it is, what is the difference between objects of primitive types and objects of non primitive types concerning memory allocation?
I also facing the same memory problem.As you said in this case it works fine. But my case i am not loading images instead i load swf file which has sound embeded to the timeline as stream.
According to this code, same memory management performs well for me also. but the sound in the unloaded swf is still audible and when i load the next swf, these all sounds mix up and i don't hear anything properly.
To avoid the sound problem i added a line SoundMixer.stopAll() to getaway the problem, but after i added this line memory management got lost and my system gets hanged.
While tracking down the source of a memory leak, I stumbled upon a strange issue with AS 3.0 and loading external flash movies. From what I can tell this somehow related to the custom classes stored inside the loaded movie. I have two versions of a basic file that contains one image on the stage (I also tried this with vector graphics with the same effect). One version has a custom document class (just a simple extends MovieClip with no additional code) and the other has no document class.
The graph below depicts the memory usage from loading the file without a document class.It performs the garbage collection as you would expect after each unload operation.However when I try to load and unload the same file with a document class, I get the following memory usage graph. As you can see, memory usage is slowly creeping up with each load operation.It almost seems that Flash is caching the class files, so I tried changing the application domain for the loaded content without success. Even if Flash was caching the class files I would assume that it would be able to detect that it had already cached the document class and simply re-load the cached version
I am making an application where I load a picture from the web at a rate of once per second. When I load a new picture I unload the old one the problem is that the old pictures are never completely erased from memory and the application keeps on consuming more and more memory until I'm guessing it eats all the memory in the cache (I haven't run it for that long yet :))
here is the code: what this does is load a picture when you click the screen, then unloads it when you click the picture. do it a few times and notice that the numbers (which show System.totalMemory) only go up but never go down to their original amount...
Code:
var url:String = "http://www.memorycity.com/shop/MBB/images/GIGABYTE_memory.jpg"; stage.addEventListener(MouseEvent.CLICK,onclick) var txt:TextField = new TextField()
When properly loading and stopping .swfs imported via the loader class the .swf is loaded into the memory. When i have close to 25 vids beeing played and each of them is about 5mb, it goes without saying that it takes alot of memory. When playing a video, selecting a new video, then going back to the old one, it loads 3 videoes intoo the memory because i use 1 single loader variable.. how you can prevent the memory leak?
I have run into a problem when trying to reuse SWF/Bitmap file loaded by Loader object. As far as I know there is only one way to do this - by using something like this. However it`s not working for me. My code:
Code: var loader2:Loader = Loader(duplicateDisplayObject(loader1, false));
Even though I addChild() duplicate loader to stage afterwards, it doesn`t appear.
I have a flash file that counts and displays the number of images in a particular folder, that part appears to work fine. I require a reset button so that the alternate directory for the images can be tested as well. For this I need to delete all the instances of the loader I created for each image, but am unable to do so.
Using ActionScript can I do with my game, which is running in a browser, verify that the user already has the files needed to run the game installed on your computer? If he had these files do not need anything else that was born and can play the game immediately. If he did not have the files, they would be loaded so that the browser does not erase these files. So when he returned to play the same game day after,as the files already on your computer, nothing need be loaded.How do I remove one of the main memory image that was loaded using the Loader class? I tried using the unload () method but nothing happened.
I am trying to load in 5 pictures but 2 of those pictures need to be added multiple times to the same scene. For example you would use Loader to load one tree but would show that tree 9 times. The problem I am experiencing is that each object loads fine once but objects that are the same with different x and y values are placed at the last location that was set in the loop.
I have a number of loader instances (loader1, loader2, loader) which I will use to load pictures. I tried to create a loop and run the command for(var st=1,st<4,st++) { _root.movie_clip.loader+st.load("picture.jpg"); } The concatenation "loader+st" doesn't seem to work. Is it not supported in AS2.0?
I'm creating an image loader with a specific effects that requires layering multiple masks over the same movieclip. in the timeline it looks like this:
What I want to do is add an instance of the loaded image into each of these masked movieclips. I'm trying this:
create a new instance of the loader and store it in an Array
Code: for (var j=0; j<allThumbs.length(); j++) { imgLoader = new Loader(); img_arr.push(imgLoader);
[Code]....
The only way I've been able to get this to work is to create an entirely new Loader object for each movieclip instance. Doing it this way loads the same image 4 times... that's not acceptable.
how I can store the image that is loaded and reuse it in the different movieclip instances?
I'm using Flex3 building my AS3 projects for some 3D effects. I am going to create 1000 polygons(or rectangles) on the scene, without texture mapping. It seems the native 3D api of AS3 needs quite a lot memory:
[Code]....
here i created 1000 sp on the scene, the runtime memory cost seems to be more than 60MB. if increase to 2000, memory goes to 120MB. It seems the FVM's native 3D api generates a bitmap texture for each sprite, it's pretty memory costing. The alternative way may be is to draw the projected vertices of the sprites frame by frame by using local3DToGlobal and drawTriangles() to render the scene, but that could be slower. So is there any way to render many instances using the native 3D feature with costing much memory?
I have a bit trouble with LoaderMax memory occupy, i have a queue, and i am keep loading images depend on user's action. if they click load more and it keep load, but i would like to clean the memory which been occupied by the previous queue (i have remove all the children been added by the loading previously). is there a way i can do it? the behavior like this.
I have an FPS monitor running and notice that I am getting choppiness here and there, bringing my game from 40 to 27 fps and back and forth at certain stages. I have an idea of where it is happening, but do not know for sure. I looked up quite a few memory monitors but haven't found anything decent yet. Is there a memory monitor that allows you to see the memory leaked and find its location? If not, how about just he memory leaked?
