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From: Jason Taylor <jason@dedoose.com>
To: "dev@flex.apache.org" <dev@flex.apache.org>
Subject: massive memory leak in Flex
Thread-Topic: massive memory leak in Flex
Thread-Index: AdKTpM4zouYw3W6nQ+uZF+rhpCeljg==
Date: Thu, 2 Mar 2017 22:36:36 +0000
Message-ID: <3B3852E122320F4CA9F2A2688F34E361AED33ED9@ORD2MBX01D.mex05.mlsrvr.com>
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archived-at: Thu, 02 Mar 2017 22:36:58 -0000

I believe I have finally identified the cause of a huge memory leak in our =
application, and it appears to be s:label
I have tested this on many different framework versions.

Please try the following:    if you make a custom itemrender and don't use =
the s:label it goes away, note disabiling TextLineReycler has no effect. =20

Using task manager, scout, and IntelliJ Idea Flex profiler all confirm the =
memory leak.  This seems like a massive issue and has been causing a lot of=
 slowdown and crashes in our app. I'm guessing I must have messed something=
 up somewhere as I don't see how sucha  massive issue could have been in th=
e framework for soo long (Tested 4.13, 4.14, and 4.15).  Please Advise.
~ JT


<?xml version=3D"1.0"?>
<s:Application xmlns:fx=3D"http://ns.adobe.com/mxml/2009" xmlns:s=3D"librar=
y://ns.adobe.com/flex/spark" creationComplete=3D"OnCreationComplete(event)"=
>
    <s:List width=3D"100%" height=3D"100%" id=3D"list"/>
    <fx:Script><![CDATA[
        import mx.collections.ArrayCollection;
        import mx.events.FlexEvent;

        private var _bindTimer:Timer;

        private function OnCreationComplete(event:FlexEvent):void
        {
            _bindTimer =3D new Timer(500);
            _bindTimer.addEventListener(TimerEvent.TIMER, OnBindTimerTick, =
false, 0, true);
            _bindTimer.start();
        }

        private function OnBindTimerTick(event:TimerEvent):void
        {
            BindData();
        }

        private function BindData():void
        {
            var items:Array =3D [];
            for (var i:uint =3D 0; i < 100; i++)
            {
                items.push(GenerateRandomString(100));
            }
            list.dataProvider =3D new ArrayCollection(items);
            callLater(BindData);
        }

        private function GenerateRandomString(strlen:Number):String
        {
            var chars:String =3D "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNO=
PQRSTUVWXYZ0123456789";
            var num_chars:Number =3D chars.length - 1;
            var randomChar:String =3D "";

            for (var i:Number =3D 0; i < strlen; i++)
            {
                randomChar +=3D chars.charAt(Math.floor(Math.random() * num=
_chars));
            }
            return randomChar;
        }
        ]]></fx:Script>
</s:Application>