Hmm... I've tried to reproduce this on IE7 and IE8 (both quirks &
standards), to no avail. I doubt it's anything in the outer HTML file,
but just in case, here's what I used:
<!DOCTYPE HTML>
<html>
<head>
<title>Hello</title>
<script type="text/javascript" language="javascript" src="hello/
hello.nocache.js"></script>
</head>
<body>
<div id='container'></div>
</body>
</html>
The initial calls to getSomeText() were causing a huge number of slow-
script warnings on IE, so I was only able to run through a few
iterations. I then dropped the count by a factor of 10 to get the SSWs
under control, and the memory usage appears quite stable after a
couple of hundred clicks. (~30MB). Can you think of anything else that
might be different in your setup?
On 27 août, 08:20, chrisr <[email protected]> wrote:
> Sorry for posting this twice. If a moderator wants to/can remove the
> duplicate go ahead.
>
> On Aug 25, 2:56 pm, chrisr <[email protected]> wrote:
>
>
>
> > I created a simple application in an attempt to reproduce a memory
> > leak issue in our decently large GWT application.
>
> > This test application basically contains a split panel with a button
> > on the left, and a tab panel full of large blocks of text on the
> > right.
> > Clicking the reload button fires the reloadRight method, and does a
> > panel.clear() to remove the old tab panel and a panel.add() to add a
> > new tab panel to the right panel. Doing this repeatedly causes memory
> > consumption to increase without bounds.
>
> > For example, on the initial load IE7 uses around 35 MB. 125 clicks
> > later its using nearly 1.5GB.
>
> > Is this example doing something in a fundamentally incorrect way?
> > How can I keep memory usage from exploding like this?
>
> > /* Example Below */
>
> > package com.example.myproject.client;
>
> > import com.google.gwt.core.client.EntryPoint;
> > import com.google.gwt.event.dom.client.ClickEvent;
> > import com.google.gwt.event.dom.client.ClickHandler;
> > import com.google.gwt.user.client.ui.Button;
> > import com.google.gwt.user.client.ui.DecoratedTabPanel;
> > import com.google.gwt.user.client.ui.DecoratorPanel;
> > import com.google.gwt.user.client.ui.HTML;
> > import com.google.gwt.user.client.ui.HTMLPanel;
> > import com.google.gwt.user.client.ui.HorizontalSplitPanel;
> > import com.google.gwt.user.client.ui.RootPanel;
>
> > /**
> > * Entry point classes define <code>onModuleLoad()</code>.
> > */
> > public class TestApplication01 implements EntryPoint {
>
> > /**
> > * This is the entry point method.
> > */
> > public void onModuleLoad() {
> > RootPanel.get("container").add( new MainPanel() );
> > }
>
> > private class MainPanel extends DecoratorPanel{
>
> > private HorizontalSplitPanel hsp;
> > private HTMLPanel lPanel;
> > private HTMLPanel rPanel;
> > private DecoratedTabPanel tabPanel;
> > int rightPanelCount = 0;
>
> > public MainPanel(){
> > hsp = new HorizontalSplitPanel();
> > hsp.setSplitPosition("25%");
> > hsp.setSize("800px", "400px");
> > lPanel = new HTMLPanel("<div
> > id=\"reloadButton\"/>");
>
> > rPanel = new HTMLPanel("<div
> > id=\"right-panel-contents\"/>");
> > Button reloadButton = new ReloadButton(this);
> > reloadButton.setVisible(true);
> > lPanel.add( reloadButton, "reloadButton" );
> > hsp.setLeftWidget(lPanel);
> > hsp.setRightWidget(rPanel);
> > this.add( hsp );
> > reloadRight();
> > }
>
> > char[] chars = new char[] {' ',' ',' ', ' ', ' ',
> > 'a','b','c','d','e','f','g','h','i','j','k','l','m',
> >
> > 'n','o','p','q','r','s','t','u','v','w','x','y','z' };
>
> > private String getSomeText(int length){
> > StringBuffer sb = new StringBuffer(length);
> > for ( int i=0; i<length; ++i ){
>
> > sb.append( chars[ (int)Math.round(Math.random()*(chars.length-1)) ]);
> > if ( i>0 && i % 60 == 0 )
> > sb.append("<br>");
> > }
> > return sb.toString();
> > }
>
> > protected void reloadRight(){
> > ++rightPanelCount;
> > rPanel.clear();
>
> > tabPanel = new DecoratedTabPanel();
> > tabPanel.setWidth("400px");
> > tabPanel.setAnimationEnabled(true);
>
> > String text = "Load count = "+rightPanelCount;
>
> > tabPanel.add( new HTML(text+"<br>"+getSomeText((int)
> > (Math.random()*500)+500000)), "Tab One");
> > tabPanel.add( new HTML(text+"<br>"+getSomeText((int)
> > (Math.random()*500)+500000)), "Tab Two");
> > tabPanel.add( new HTML(text+"<br>"+getSomeText((int)
> > (Math.random()*500)+500000)), "Tab Three");
> > tabPanel.add( new HTML(text+"<br>"+getSomeText((int)
> > (Math.random()*500)+500000)), "Tab Four");
> > tabPanel.add( new HTML(text+"<br>"+getSomeText((int)
> > (Math.random()*500)+500000)), "Tab Five");
> > tabPanel.selectTab(0);
>
> > rPanel.add( tabPanel, "right-panel-contents" );
> > }
>
> > private class ReloadButton extends Button{
>
> > private MainPanel mainPanel;
>
> > public ReloadButton(MainPanel p){
> > super("Reload Right Panel");
> > this.mainPanel = p;
> > this.addClickHandler(getClickHandler());
> > }
>
> > private ClickHandler getClickHandler(){
> > return new ClickHandler(){
>
> > @Override
> > public void onClick(ClickEvent
> > event) {
> > mainPanel.reloadRight();
> > }
> > };
> > }
> > }
> > }
>
> > }
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