IDE :: High Cpu Usage - Force The Flash To Do Garbage Collection?
Nov 16, 2009
my flash has lots of images and dispaly objects. Hence it costs high cpu usages. after using my flash for an hour, it is dieing.I am trying to reduce it. I have some questions here:
1. I create an array, or string at frame 1 for example, when I go back to frame 1, should I create a new array, or a new string?? Or is it better to make it empty array(eg:[]) or empty string("")? which way it reduces cup uasge more?
2. does anyone know how to force the flash to do garbage collection??
3. any other possible reasons that cause high cpu usage?
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Similar Posts:
Jun 1, 2011
I want to know about the Object type specifically when it comes to garbage collection in Flash.
I know that items will be ready for garbage collection in situations like this:
[Code]...
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Jul 11, 2011
Yesterday when playing a game (Balloons Tower Defense 3) I noticed that the game started to slow down over time and then randomly speed up very quickly. Looking at the memory usage dropping each time I assumed it was the GC running.
As a legitimate question, is there anyway to force Flash to GC from, say, Firefox? Perhaps there's an addon or a command you can run that will do this? I know that you can do System.gc() but this game isn't mine so I can't modify the source with a "Click here to GC" button.
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Dec 7, 2006
When ever there are no longer any references pointing to an object in memory, that object is purged from memory and permanently forgotten by the player.
Code:
delete a; // Object has reference count of 1
delete b; // Object has reference count of 0, removed from memory
Note: remember, the delete operator only removes variable association, it does not delete objects in memory, the GC is responsible for that. Also delete will only work on non class member variables.
I have a class called MenuView which contains buttons. After a button from the menu is clicked, its content - which is contained in another class - is being attached to the existing class by the means of the new keyword, so basically it just creates SubClass inside the MenuView class (or instance of another class inside the MenuView Class object if you like):
Code:
_sign_content = new NewEntryView(width);
_sign_content.addEventListener("newEntry_submit", onNewEntrySubmit);
addChild(_sign_content);
NOTE: _sign_content is private property of the class of type NewEntryView (this class contains the content for the button clicked)
Inside this NewEntryView Class (which is being referrenced by the _sign_content property by now), there are textFields being attached to the DisplayList, eventListeners being called, subclasses being created, all that in different functions of the class.
Now when user clicks another button in the menu, i have to set _sign_content=null etc., so that GC can harvest it.
I do so this way from within MenuView class:
Code:
if(_sign_content != null) {
// remove container
removeChild(_sign_content);
[code]....
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Jun 13, 2009
I have a strip of SimpleButton-s which on mouseover will display a Bitmap in a Sprite location along with some TextField-s whose positions are dynamically calculated based on the Bitmap.width.With the below code, I find that the memory usage (Windows Task Manager > Processes) keeps increasing on each MouseOver. How do I force garbage collection or explicitly delete the new TextField-s?
Code:
function onMouseOver(index:uint)
{
_theSprite.removeChild(_theTextField);
_theSprite.removeChildAt(0); // the bitmap
[code]....
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Oct 16, 2010
[code]At the time when Camera.getCamera(1) is attached to vid1, is Camera.getCamera(0) destroyed internally or still in memory?
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Feb 21, 2009
As more and more FLV videos are moving to HD, I'm noticing high CPU usage and lots of dropped frames when playing FLV video in web browser with Flash 10. This is true even if the video isn't full screen. I've tried a variety of browsers (Firefox, I.E., Chrome) and the problem occurs on all of them so it's pretty clear it's a limitation in Flash.
Now my PC isn't high end (it has a Pentium M 1.86 GHz processor), but I can take those same FLV files and load them in something like Media Player Classic or Windows Media Player (when using ffdshow) and play the FLV files full screen with little or no drop in frames and an acceptable CPU rate.
This is especially annoying on sites like YouTube where I actually have to save the video and play it back in something other than Flash to have it play back at an acceptable rate. This doesn't work for other sites like Amazon.
Why is the CPU usage so high when decoding and displaying videos when compared to other media players?
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Dec 22, 2010
I put together a quick sample just to test out the garbage collection convenience functions in casalib.
All seems to work well (i.e, objects are removed from the stage, listeners are stopped) however I am using Mr. Doob's stats display and it looks like my memory usage isn't going down after the destroy method is called?
[Code]...
Are my items actually being marked for garbage collection? What am I doing incorrectly?
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Nov 8, 2010
I know that there have been questions asked about garbage collection and memory management and after hours of searching through the internet I frustratingly haven't been able to find a solution to my problem.So here it is:I have a function that reads an XML files and creates thumbnail instances of a class. The class contains the usual information as well as two listeners for MOUSE_OVER and MOUSE_OUT. The thumbnails are movieclips and are placed in a sprite container/holder. The container/holder is created with code:
Code:
var containerProjects:Sprite = new Sprite();//Creates sprite to contain projects
spriteGallery.addChild(containerProjects);//Adds container to main container
[code].....
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Feb 24, 2012
I've hired a freelancer, to make a design for my flash app. And everything was fine, untill I saw this. It was an animated background. It has about 100 tweened movie clips, that do pretty much the same - simple rotation tween, but cpu usage on that background only reaches 17-20%. Its high for such a small effect. I've tried to optimize it - removing all code, and leving just timeline based tween, but that didn't solve my issue.[URL]
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Feb 5, 2012
I'm building a GUI for a karaoke system which uses Flash IDE.
Im not doing the OOP method, if you ask me why, its becoz I code slower with OOP and I need this urgently.
Anyway, I had only created 3 scenes with several simple MovieClips in it and some png files as button icons.
When I try to publish it and run, i noticed it will just freeze my Flash IDE and I've checked the CPU Usage in TaskMgr, it shows over 50% usage.
The filesize for this FLA is just 992KB, so you can probably tell that it doesnt have much bitmap in it.
I am hoping someone in this forum could show me some light as I've already struggle for the past 12 hours with no luck at all.
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May 12, 2009
I've been deploying video to the web via Flash for a couple years now and I was curious if anyone has experience with / knows if deploying video via a Flash Media Server or any other type of video centric server has a significant impact on performance playback? I've noticed lately that with YouTube content, often available in "HQ" or "HD" that the video playback suffers very marginally when switching to higher quality video. However, with video players I have developed, using HTTP progressive download, CPU usage often spikes during download of the video and decreases once it's been cached. I've also recently employed pseudo-streaming techniques with the help of XMOOV but this doesn't seem to have much of an effect on CPU usage during video download.
My video player was developed in AS3 and while it's not using a class based structure, it does follow general OOP techniques. Would a class based video player improve performance? Here is a link to a work in progress video player: [URL] Please try a couple videos and let me know if they play back smoothly and / or if you notice CPU spikes. Also note that the only video that makes use of XMOOV is the "Make a Wish" video as it's been injected with the necessary metadata.
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Oct 30, 2011
I've a question about garbage collection in flash.I'm making a game using with Flash AS3. This game will stay open for a few hours, like 5 - 6 hours. People will play it again and again in these hours. I have 15 loader in my flash game and don't want to have a problem with Garbage Collection. I'm uninstalling every load object when it is not necessary but i'm not sure do i have trouble about this garbage collection?
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May 4, 2011
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?
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Sep 26, 2011
I have memory leak in my project and I wonder how garbage collector working in Flash Media Server.I have 2 questions: Will FMS release objects from memory that have cycle references. For example when object A is has ref to Object B and vise versa.Why FMS still consumes memory after application unloaded by idle timeout. For example there were no users connected then fms unloaded app after 20 minutes. Memory usage left at the same level (for a long period of time).
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Jul 8, 2011
I am creating an CS5 flash application that is based largely on a library for loading MP3 files located on a user's computer using file references.
The issue I am having is that each time a new song is loaded, most of the memory is garbage collected but a small amount remains. In most cases this would be fairly unimportant, but the purpose of the application involves the user selecting a large number of mp3 files.
I am a bit new to AS3 and OOP, but I have come to the conclusion that the memory leak is within the library classes. I have tested the library using the smallest amount of my own code I could, and the problem remains. I did make minor changes to one of the library files, but as far as I can tell it is not the cause.Here is a link to the library, the actual download link is the "MP3FileReferenceLoaderLib.zip" link part way down the page:[URL] Here is the code I have for the main .as file:
Code:
package {
import flash.display.Sprite;
import flash.events.Event;
import flash.events.MouseEvent;
import flash.net.FileFilter;
[code]....
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Mar 25, 2011
I if create a sprite, and that sprite contains numerous child sprites (which themselves also contain child sprites), do I need to worry about garbage-collecting everything, or just the parent sprite? What if the child or grandchild sprites have listeners attached?
For example, let's say I have a class (a subclass of a Sprite) that creates a screen in an application.That screen contains numerous Sprites for all of the UI affordances on the screen (e.g., buttons, drop-down menus, textfields, etc.) Many of those sprites have event listeners on them.So, in my application, I have this:
var myscreen:MyScreenClass = new MyScreenClass();
this.addChild(myscreen);
Later, when the user is done with that screen, I remove it:
this.removeChild(myscreen);
myscreen = null;
Is that all I need to do? Or, do I need to go recursively through myscreen, removing all it's child Sprites and Event Listeners?In other words, if you GC a parent, are all it's children, grandchildren, great-grandchildren, etc. also GC'ed?(For what it's worth, I'm using weak-references in my event listeners...)
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Aug 10, 2011
I'm trying to unit test memory management. So far I have a semi-workable solution using flash.sampler.getSamples to get the difference between the number of NewObjectSamples and DeleteObjectSamples which have the same id value.
The test looks something like this:
startSampling();
new Foo();
new Foo();
[Code].....
Since there are no references to Foo I'm assuming that all instances are being garbage collected, and my code is simply wrong due to my lack of understanding how sampling works. I am trying this instead of using weakly keyed dictionary because it seems it should be less of a hack, but now I'm starting to wonder if it's worth the trouble.
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Jan 19, 2010
Just curious, If i nest a movieclip inside of another movieclip, and the nested movieclip is attached to a custom class. And that custom class has a Event.ENTER_FRAME listener. when I destroy the container movieclip, will flash get rid of the event listeners inside of nested movieclip's custom class ?
May seem like a silly question but flash has a tendency of not killing listeners along with the movieclip itself once it is removed from the stage(this is if your apply the movieclip via addChild). and its a hastle when things get too complex. My solution was to create a single loop for all my objects. Now ive come to a point where I am probably going to have to nest some movieclips inside of another so the position of the nested movieclip stays relative. the parent movieclip will be rotating and scaling so I rather nest it. But I got to know how flash handles moveiclips that are nested into a parent movieclip and has enter frame listeners.
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Jun 25, 2009
It is known that a display Object removed from the display list will be garbage collected only if any event listener associated with it is removed.What I would like to know, but could not anywhere find an answer to, is that for a class that we create which extends, say Sprite, and uses and manipulates various other display elements within it, while removing an instance of this class from the display list is it sufficient to remove the event listeners associated with the instance of the class, or do we necessarily have to remove all internal event listeners of the class definition associated with the display objects that the class uses and manages.
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Nov 6, 2011
I understand that Objects not referenced by anything are garbage collected, and have been making sure to null out referenced to objects when I'm done with them. What I want to know are a few things:Do only Objects need to be null-referenced?How often does garbage collection usually run? Does it tend to run when processor demand is low? Is there a way I can tell garbage collection to run manually, such as when I'm done with a playing field full of sprites? This is not really needed if garbage collection tends to run when processor use is low, since it will run anyway at the times I'd like it to.Objects created just for the scope of an if or for statement etc, unless they are assigned a reference elseware, are eligible for garbage collection, right?
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Feb 16, 2009
I have a question about garbage collection: I am using a MVC pattern for a photo gallery website.Every view displays a thumb viewer/controller and an image loader. Each view extends an abstract class that has a close() method that looks like this
PHP Code:
//AbstractViewer class
public function close():void {
[code].....
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Apr 16, 2009
I have helped write a program in AS3 that uses classes. We have 2 frames in our movieclip that consists of an ant moving. We have a class of ants and can create 15 instances of them and the program runs fine with the ants walking around looking for food and going back to a corner that is their nest and going back out again. The ants also respond to mouse movement if the mouse pointer is near an ant.
If we create more than 15 ants, then the program starts to slow down. If we have 30 ants on the screen, then there is noticable stuttering of the ant movement. The CPU usage on a P4 2.5Ghz Pentium is around 50%.
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Jun 11, 2003
I am loading an XML file (fairly large document). It takes a high amount of my CPU(almost 100%). This prevents me from working on other applications. Also, it takes a lot of time to load.
reduce the CPU usage.
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Sep 25, 2008
No matter what I do I cannot solve a tween AS3 Garbage Collection problem I am having that is wreaking havoc on my tween instances working correctly/consistently. Some Sprites never tween at all, some do but only part way. And it effects different ones almost each time.
I have read a fair amount recently on AS3 Garbage Collection and improperly referenced Tweens and other asynchronous instances getting picked up in mid process. I am experiencing the signature inconsistent behaviour that the I have read of.
I have tried using class level Static and non static properties to store references to my Tween instances so they will not be marked for GC. No luck. I have placed references to them in Class level Arrays, I have also used TweenMax's static to() Method that insures that it will shield it from GC and its alt. non Static
constructor instantiation, with persist:true. I also implemented another custom package; GCSafeTween(), other users said it does as it should, but it's not working in my case.
To test the GC problem, I edited the two eventListerners() in the Adobes' fl.transitions.Tween so that their default weakReference property was false. Doing this made the Tween work correctly. But that's a terrible solution.
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Mar 31, 2012
A flash file loads a swf that has flash video using a loader request, which once loaded, wont unload and slows things unbearbley. I understand that once unloaded the flv will keep playing until Flash disposes of it.
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Apr 20, 2010
I'm building a large flash site (AS3) that uses huge FLVs as transition videos from section to section. The FLVs are 1280x800 and are being scaled to 1680x1050 (much of which is not displayed to users with smaller screens), and are around 5-8 seconds apiece. I'm encoding the videos using On2's hi-def codec, VP6-S, and playback is pretty good with native FLV players, Perian-equipped Quicktime, and simple proof-of-concept FLV playback apps built in AS3.
The problem I'm having is that in the context of the actual site, playback isn't as smooth; the framerate isn't quite as good as it should be, and more problematically, there's occasional jerkiness and dropped frames (sometimes pausing the video for as long as a quarter of a second or so). My guess is that this is being caused by garbage collection in the Flash player, which happens nondeterministically and is therefore hard to test and control for.
I'm using a single instance of FLVPlayback to play the videos; I originally was using NetStream objects and so forth directly but switched to FLVPlayback for this reason. Has anyone experienced this sort of jerkiness with FLVPlayback (or more generally, with hi-def Flash video)? Am I right about GC being the culprit here, and if so, is there any way to prevent it during playback of these system-intensive transitions?
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Oct 14, 2010
i want to know what types of objects should be removed for garbage collection? i m working on a bit long project. i've made it in flash application. i've 5 frames. each frame contains scripts. i've declared public variables as well as private and local. obviously assigned some eventlistener and so.. while moving from one frame to another, i want to remove unnecessary objects to garbage collection.whatever i understood, i nullified all the public variables and removed all the public eventlisteners (eventListeners which are in functions, I believe those can only be removed within that function). Objects (incl movieclips and all these) which were added dynamically, i removed them using removeChild() method..
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Sep 15, 2009
I have an object that contains a timer. I do addEventListener on the timer and start the timer.At some point the object is deleted but I find that the timer keeps firing (using trace statements).What I don't get is, how come when I delete the only object that has a reference to that timer, the timer doesn't go away along with the event? Or do I have to do a removeEventListener() on the timer before removing the object for it to go away?
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Mar 3, 2010
Code:
var a:MovieClip = new MovieClip();
var dict:Dictionary = new Dictionary(true);
[code].....
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