JQuery :: Stop IE $.getJSON() Memory Leak
Mar 12, 2010
I have started using jQuery recently and I am having a problem with IE leaking memory when performing a $.getJSON() request at intervals. To test the problem I set up the code to run every second. The only code I currently have running is the ajax request as below:
getDetail = function(detailID){
$.ajaxSetup({ cache: false });
$.getJSON("api/urlgoeshere", {"dID" : detailID,"d" : 0},
[Code].....
If I leave the above running the Memory Usage climbs by about 5mb a minute in IE but is ok in Firefox. I am using jquery-1.4.2. Has anyone come across this before?
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Mar 26, 2009
First the code:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="content-type" content="text/html; charset=utf-8"/>
<title></title>
<script type="text/javascript">
function TextScroll(scrollname, div_name, up_name, down_name, top_name){
[Code]...
When I use mouse wheel in Firefox to scroll contents of the DIV, memory usage in Firefox goes through the roof. Code above is a fully working page, if anyone would like to see what's up, just load it up, and start moving your mouse wheel in the area with text. You don't actually have to scroll the text, just moving the wheel back and forth in that DIV will do. Memory usage will start going up quite fast, and after you stop moving the wheel, it will finally come down a bit after a short while. I've highlighted in red the line where mousewheel event is registered for Firefox. I'm not sure if it's really a problem, but since Opera and IE don't have any strange memory usage, and Firefox does, maybe I did something wrong. In everyday use it shouldn't matter [don't expect to have kilometers of content to scroll], but anyway, it is a bit unsettling.
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Feb 19, 2010
Below is my code which refreshes every 10 seconds
[Code]...
What happens there is a memory leak of the divs with idsliveAuthen-target-1000 andliveAuthen-content-1000
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May 28, 2011
Attached is a sample html file (named jqmleak.html - rename it to remove the txt extension and drop it into your web server to test for yourself) that I've put together to demonstrate a memory leak with the $.ajax function in jQuery 1.6.1 when run in Firefox 4.0.1. The file loads jQuery 1.6.1 from the Google API CDN. Next, a simple function is defined that runs $.ajax to request the html file itself. This function is then set to run once every second using setInterval.
In Firefox 4.0.1, on both Win XP and Linux (ubuntu 10.10, 64-bit), I can watch the amount of memory consumed by Firefox gradually rise. It takes a few minutes for the problem to be observed, because initially the memory will decrease with no other activity in the browser. Then after about 5 minutes or so, I can watch the memory used by Firefox slowly but steadily increase. I can use the handy 'about:memory' tool in Chrome to monitor this alongside other browsers. Chrome, Opera, and IE do not exhibit the same problem with this test. Their memory usage will vary within a range of about 2 or 3 mb, but over a long period of time they do not increase their total amount of memory used. This problem is only happening in Firefox 4.0.1 as far as I can tell (I also used safe mode in Firefox to make sure no plugins were interfering with the test). I have tried both GET and POST methods with the $.ajax call, and with the cache setting both enabled and disabled. The result is the same.
Is this a jQuery problem, or maybe instead a bug with Firefox? I see similar bugs reporting memory leaks in other situations, but usually specific to IE. I was about to report a bug for this, but I thought I'd check here first to see if anyone can duplicate this problem, and/or point out what I should do to prevent the memory leak in Firefox.
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May 2, 2006
I've been putting together a small pet project. Once it was finished i realised it had a gigantic memory leak inside of it. I tried to read up on the subject, but couldn't find the source of the problem via the articals.
This site is very simple, so I'd think idenifying (and hopefully fixing) the problem would be easy. Here is the relavent portions of JS (followed by links to the full page incase you need to see that): Code:
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Mar 26, 2006
I was wondering how good is JavaScript with memory management. I have
an object called MANAGER that has a list of other objects, each one
managing a single DOM nodes, etc. In my implementation of
MANAGER.reset(), I simply recreate my MANAGER.object_list = new
object(); and do a single MANAGER.domnode.innerHTML = '' as apposed to
getting my hands dirty. Is my app leaking memory?
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Nov 20, 2006
Internet Explorer leaks memory when I update a div container using
innerHTML, this does not occur in firefox. This would not be a problem
except the webpage is required to be left on for weeks on end without
being restarted. I presume the issue with innerHTML is that Internet
Explorer apparently parses what you give it and then decides on how to
construct the dom elements itself, so never truely creates what you
give it.
I know that the innerHTML is the problem as I have successfully
narrowed down the leak to that line. It only leaks memory when I assign
content to the innerHTML of my containing DIV. Appending a text node,
for example, with the exact same information to the same div does not
leak. Note I have also tried using such existing AJAX packages like
Prototype etc. but to no avail.
I need to do it this way as my XML documents are styled using an XSL
stylesheet and then transformed using transformNode [I will omit
details regarding firefox as there is no problem there]. I have looked
into transformNodeToObject as a way to get a dom object that I
originally assumed could be appended [as a child] to my containing
element. This did not work and gave me compatibility errors.
I suppose I am either looking for someone who has solved this problem,
or who has an acceptable work around. Or someone to say that it cannot
be solved.
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Jan 19, 2010
Do the latest browsers still need this? I could find an article about IE8 which states that its garbage collection has improved so circular references shouldn't be a big problem any more.Reason for asking is that I maintain an JavaScript / AJAX framework and we are currently optimizing our code which contains a lot of code to remove references from and to the DOM and to remove event listeners.
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Oct 3, 2007
I posted this originally in the csharp group, but I think that may be the wrong group. This seems more appropriate:
I'm running into an issue with a memory leak in an Asp.Net web page.
In the code behind (.cs) I'm adding onchange, onblur and onfocus events to a bunch of objects that reside on my page (textboxes and dropdownlist).
After using Drip i've found that these are leaving open DOM objects....
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Mar 13, 2007
I am working with Netscape 7.0 and need to bind a <divwith the
innerHTML property. More specifically, I need to bind a GridView in
the div in question. I am binding the div with some hardcoded data (a
table, which is the HTML equivalent of a GridView). Is there a way
with javascript to dump the memory used by a DOM object (the div that
I am binding with innerHTML)? When i just receive the variable in
javascript, it doesnt seem to leak. I have tried removing and adding
the div each time I bind to it, but it still leaks.
Here is the code:
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Sep 12, 2009
I have a page that dynamically loads and unloads whole sections and creates complex links between various objects and have never been sure exactly what happens when an object that is being observed is deleted from the DOM. Since there is no longer any link to deleted objects, the listener objects obviously won't receive any updates, but do the underlying "listener" connections get purged as well? I guess it would depend on whether the listening mechanism is part of the listened-to object or is maintained in a separate area of the browser.
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Dec 4, 2010
The problem is, the extension tend to crash when there is no internet connection, and sometimes, the http requests fail to communicate with gmail server, they got built up over time and end up flooding the memory.
[Code]...
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Dec 11, 2006
I'm using Drip 0.5 to test for a memory leak in some code. After reducing
the page down bit by bit to find the leak, I ended up with an empty page
that still leaked!
The page source is exactly this:
<html>
<head><title></title></head>
<body></body>
</html>
It doesn't leak the same amount each page load - sometimes it's 8192,
sometimes it's 16384, sometimes even reducing the memory load. But the
overall trend is an upward movement. I let it run for 10 minutes and it
leaked almost 10MB, so it's about 1MB/min.
This is not a serious leak, but it's making it harder to know if a leak is
caused by the js code or this other thing going on.
Has anyone else run into this? Any ideas what the problem is? I've shut down
all processes, removed all IE add-ons, etc, but no change.
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Mar 16, 2011
It is possible to remove a function from the memory? I have a custom function that I call usingmodul.StepGuide.init() - but how do I remove that function with all its vars and events, from the memory.
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Jun 15, 2009
I have a table, 10 cols, 200 rows. Using tablesorter causes a memory leak on every page refresh of almost 2mB. A smaller table causes a proportionately smaller memory leak. Is there way to clear this memory? I've tried setting inner html of the table to '', but it makes no difference. Is there even a universal method i can call to remove any trace of any jquery plugin I have on the page?
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Oct 27, 2010
I have a jquery based system with ajax calls instead of page refreshes. Every time I return some ajax content, it replaces the content on the main div.
function execcmdcallback(data, textStatus, XMLHttpRequest)
{
$("#divmain").html(data);
data = null;
}
Each time this executes, the browser memory increases by about 600-900kb. Can anyone suggest a way of doing this where the old memory is freed so there is no significant increase in browser memory on each ajax call ?
I've studied this a bit, [URL]..., but I have to admit I don't quite understand it I see the same issue on IE8, FF and Chrome. FF comsumes less memory per ajax call and frees some memory seconds later, but still the total working set is increasing on each call by 300k in FF and 600 to 900 in chrome and IE
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Apr 8, 2011
I'm currently trying to code a jQuery base memory game for school. I however got one problem right now. The cards are supposed to change picture on mouseover and change back on mouse leave. However, if you click on a picture, that card isn't supposed to turn back right away. I thought I could fix this with classes, but it doesn't work. Here's a part of the code:
$(document).ready(function() {
$("img.spelkort").mouseover(function() {
$(this).attr("src","spelkort/kortbaksidahover.jpg");
$(this).addClass("hover");
});
$("img.spelkort.hover").mouseleave(function() {
$(this).attr("src","spelkort/kortbaksida.jpg");
$(this).removeClass(".hover");
});
$("img.spelkort").click(function() {
$(this).attr("src","spelkort/kort1.jpg");
$(this).removeClass(".hover");
});});
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Nov 3, 2011
I m trying to make a person stay on same page on cancel, but the confirm takes the user to the next page like they press ok. how can i stop it? code...
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Aug 17, 2011
I have a code for the keydown event:
-when you press the UpArrow key the image moves up
-when you press the DownArrow key the image moves down.....and so on
But don't forget that this is under the keydown event...so when I keep pressing the UpArrow key the image moves up but when I release the key the image still moves up. I already put the code $('myImage').stop(); on my image on keyup event but this doesn't do anything. There is a code to clear my memory from pressed keys or something?
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Jun 14, 2011
Trying to upgrade from JQuery 1.4.3 to 1.6.1. My getJSON queries no longer populate my SELECTs. The below code works perfectly in 1.4.3 but unsure what changes I need to make for 1.6.1.
function populateCause() {
$.getJSON(urlQueries, {sql:'list_causes'}, function(data) {
var select = $('#opencause');
var options = select.attr('options');
[Code]....
The ONLY change I made is sourcing JQuery 1.6.1 instead of 1.4.3. Evidently I need to change the method of parsing the JSON data also.
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Jan 5, 2012
Working on creating my own plugin and realized that I would very likely end up doing this again in the future. Unfortunately, I have an extremely short memory when writing code. I frequently have to re-read the code I've created the day prior so I can get back on track with what I was doing. As such, I'm a fervent commenter in my code.
So, I'm creating a jQuery plugin framework with comments for everything that's going on in the framework to prevent my brain from having to re-learn everything in a month or so when I do another one.
Plugin-savvy folks to take a look at this code and help me fill in the blanks and make corrections to those places where I'm way off base. As you'll likely notice rather quickly, this is taken from the jQuery plugin tooltip construct found here: [url]
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Sep 5, 2009
I am using the getJSON command and using firebug for debugging, if I go to this server i setup with this url: [URL] It returns json data warped with getdata({data}). I have validated the json part using jsonlint, so from firebug's net tab I get a param (callback getdata), header and response, etc. as expected. But if I use jquery's getjson, I get param, and header but the response is empty and function callback doesn't trigger (no alert). (I know that getjson uses OPTIONS instead of GETS and I can see that the request is made on the server and the json should be sent as normal).
Here is my code for this section:
<script type="application/javascript">
function getdata(data){
alert(data.name);
[Code].....
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Aug 12, 2009
The problem I'm facing is as follows. I'm using a JSON call to checksome data before doing a JS redirect to a different page. The redirectworks but it's impossible to get back to the initial page using thebrowser's back button. The initial location is not being stored in thebrowser's history.This is the script simplified. If placed on[URL]browser's back button.
<code>
$(document).ready(function(){
$('#click').click(function(){
[code]....
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Feb 3, 2010
After upgrading to jQuery 1.4.1 from jQuery 1.3.2, my getJSON requests fail.The error given to the ajax error handler, is "Invalid JSON: ..." where "..." is the text of the response.Firebug parses the JSON fine, and can display the JSON data as such in its console, and jQuery didn't have an issue with the same data with version 1.3.2.
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Aug 17, 2011
I would try retrieve some information from a database (and eventually graph it I hope!).
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
[Code].....
But if I view the "contents" tab in httpfox I can actually see the data under <sourcetext> I require but there is an XML parse error.
<?xml-stylesheet
href="chrome://global/locale/intl.css" type="text/css"
?>
<parsererror>
[Code].....
The NS_ERROR_DOM_BAD_URI seems to be about cross domain issues but I'm working locally on the actual server so should I be able to access the data? Also why is there an XML parse error when I can see the exact data I want in httpfox's "Content" tab?
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Dec 8, 2010
I have setup a little example here: [URL] It is JSONP because of cross site policy. The returned JSON is valid, you can check the response in firebug. The callback function is not fired.
Tested with jquery 1.3.2, 1.4.2 and 1.4.4. Same result.
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