Re: [flexcoders] Runtime Memory Problems

[Mike Collins]

Sorry, I wrote down the numbers incorrectly.

Our images are between 256Meg and 600Meg and the app grows to 2.5GIG while I
only have 2Gig of physical memory.
100 Meg woudl be nice :)

Mike


On 3/15/07, slangeberg <[EMAIL PROTECTED]> wrote:

 Only after I hit a saturation
> point (Around 2.5Meg) would it Garbage Collect. My machine has 2Gig
> of Ram.
>

You're worried about a Flex app using 2.5MB memory? That's nearly nothing.
I've seen apps use upwards of 100M, and that's still not much compared to
2GB.

If you look at the articles online and perhaps posts within this list,
you'll see that there are indeed thresholds within the player, to kick in
garbage collection, but in this instance, i don't see the issue.(?)

-Scott


On 15 Mar 2007 08:41:48 -0700, One Person <[EMAIL PROTECTED]> wrote:
>
>   Description:
> We are creating a web-app built with Flex 2.
> This app uses some very large image files (From around 256K to over
> 600K)
> We have an image viewer section of our Flex app that will allow the
> user to move from one image to another.
> I was noticing that with our app in IE7 that memory useage would
> climb each time we grabbed a new image but even after letting it set
> for several minutes the memory usage would not go down. It was acting
> as if Garbage Collection was not getting called. So I added all kinds
> of code to make sure that we were letting go of the previous images
> to allow Garbage Collection to work.
>
> After 3 days of trying to track down the problem I decided to create
> a smaller Flex app that only used our image viewer control to limit
> the number of variables in the problem. After a few hours I still
> could not figure out the problem so I replace our image view with a
> standard <mx:Image> tag. The problem still existed after doing this.
> Having take our code out of the picutre I decided to compare results
> in FireFox. FireFox would Garbage Collect fairly quickly and the
> problem did not seem to exist using my test Flex app in FireFox.
>
> From what I can tell, IE7 and Flash (version 9.0.28.0) do not seem to
> work well at allowing Garbage Collection to work.
> I have the same version of Flash installed in FireFox 2.0.0.2 and
> there does not seem to be any problem there.
>
> The code below is what I used in my mxml file. To test it you will
> need to point to some kind of large images that you have access to.
> The images that I was using are on an internal network and so are
> unavailable to anyone on the outside.
>
> <?xml version="1.0" encoding="utf-8"?>
> <mx:Application
> layout="absolute"
> xmlns:mx="http://www.adobe.com/2006/mxml";
> initialize="init()"
> >
> <mx:Script>
> <![CDATA[
>
> public var urls:Array = new Array();
> public var index:int = 0;
> [Bindable] public var tempUrl:String;
>
> private function init() : void
> {
> urls.push( "http://10.7.2.8/07026/07026_00115.jpg"; );
> urls.push( "http://10.7.2.8/07026/07026_00116.jpg"; );
> urls.push( "http://10.7.2.8/07026/07026_00117.jpg"; );
> urls.push( "http://10.7.2.8/07026/07026_00118.jpg"; );
> urls.push( "http://10.7.2.8/07026/07026_00119.jpg"; );
> urls.push( "http://10.7.2.8/07751/07751_00473.jpg"; );
> urls.push( "http://10.7.2.8/07751/07751_00474.jpg"; );
> urls.push( "http://10.7.2.8/07751/07751_00475.jpg"; );
> urls.push( "http://10.7.2.8/07751/07751_00476.jpg"; );
> urls.push( "http://10.7.2.8/07751/07751_00477.jpg"; );
> urls.push( "http://10.7.2.8/07751/07751_00478.jpg"; );
> urls.push( "http://10.7.2.8/07751/07751_00479.jpg"; );
> urls.push( "http://10.7.2.8/42401/42401_00000000.JPG"; );
> urls.push( "http://10.7.2.8/42401/42401_00000002.JPG"; );
> urls.push( "http://10.7.2.8/42401/42401_00000003.JPG"; );
> urls.push( "http://10.7.2.8/42401/42401_00000004.JPG"; );
> urls.push( "http://10.7.2.8/42401/42401_00000005.JPG"; );
> urls.push( "http://10.7.2.8/42401/42401_00000006.JPG"; );
> urls.push( "http://10.7.2.8/42401/42401_00000007.JPG"; );
> urls.push( "http://10.7.2.8/42401/42401_00000008.JPG"; );
> index = 0;
> setCurrentIndex();
> }
>
> private function setCurrentIndex() : void
> {
> img.source = urls[index];
> }
>
> private function previous_Click() : void
> {
> if( --index < 0 )
> {
> index = urls.length-1;
> }
>
> setCurrentIndex();
> }
>
> private function next_Click() : void
> {
> if( ++index >= urls.length )
> {
> index = 0;
> }
>
> setCurrentIndex();
> }
> ]]>
> </mx:Script>
> <mx:Grid width="100%" height="100%">
> <mx:GridRow width="100%" height="30">
> <mx:GridItem width="100%" height="100%">
> <mx:Button label="&lt;" click="previous_Click()"/>
> <mx:Button label="&gt;" click="next_Click()"/>
> </mx:GridItem>
> </mx:GridRow>
> <mx:GridRow width="100%" height="100%">
> <mx:GridItem width="100%" height="100%">
> <mx:Image id="img" source="{tempUrl}" width="100%"
> height="100%"/>
> </mx:GridItem>
> </mx:GridRow>
> </mx:Grid>
> </mx:Application>
>
> I can't find a way to post my images so I hope this description is
> good enough.
>
> In IE7 the memory would climb each time I would move to the next
> image. On the left of this graph I loaded several images and then let
> IE7 sit. After a few minutes, and memory staying where it was, I
> continued click next to load images. Only after I hit a saturation
> point (Around 2.5Meg) would it Garbage Collect. My machine has 2Gig
> of Ram.
>
> The next rise in the graph is where I kept loading images over and
> over until the memory usage was about the same as just before the
> garbage collection happened the previous time. I let that sit for a
> while and then tried to load one more image. That caused the garbage
> collection to happen.
>
> The next 4 peaks in the graph are where I basicly clicked on the next
> button over and over as fast as I could and the Garbage Collection
> seemed to happen a little more often.
>
> In FireFox I ran similar tests of loading images and waiting in
> FireFox. The Garbage Collection seems to be working fairly well here.
> Each time I would load a new image the previous one would be cleaned
> up with garbage collection.
>
> So I'm not sure what can be done or if there is a fix for this. I
> really would LOVE to have access to the Garbage Collection in Flash
> so I could force things to happen when I am dumping a real large
> image.
>
> Thanks,
> Mike Collins
>
>


--

: : ) Scott