[jQuery] Memory leak in blank index.htmljquery

[Michal . Till]

Hi all,

I was investigating a memory leak in my application and unfortunately 
everything led to jQuery. So I created this simple HTML file:

html
head
 script src=packages/jquery/jquery-latest.pack.js /script
/head
body test /body
/html

Then I started Drip, the IE Leak Detector 
(http://outofhanwell.com/ieleak/index.php?title=Main_Page) and hit the 
auto-refresh button. I was very surprised while viewing the memory consumption 
in Process Explorer (by SysInternals, now Microsoft) (the private bytes 
graph, that is the real allocated memory). It was climbing up and up and up... 
about 0.2-0.5 MB each reload. (I like the Process Explorer more than the memory 
graph provided by Drip).

Remember, Drip is far from 100% reliable. It's function Show DOM leaks shows 
only some and even if it shows nothing, the app can be still leaky. Actually, 
it showd one element leaking, that one mentioned in 
http://jquery.com/dev/bugs/bug/705/ . I don't know how this bug was resolved 
and I think that it's not connected with the general leak in the upper code. If 
I add the line suggested in mentioned bug site, this record of leaking SCRIPT 
id=__ie_init src=//: defer __drip_hooked=true/SCRIPT goes away, but as I 
said, AFAIK it has nothig to do with the main problem.

Thanks for answering,
Michal Till

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Re: [jQuery] Memory leak in blank index.htmljquery

[Michal . Till]

Hi,

 How fast are you reloading? What version of jQuery are you using?

To limit possible influences, I made the same experiment with plain IEs 6 and 
7, reloading the test file manually, once in a 15-20 seconds interval. I use 
the latest file from jquery.com, 1.1.1, * Rev: 1153, Date: 2007-01-22 00:27:54 
-0500.

It agains shows an increase of about 100-500 kb of memory, when inspecting 
directly the iexplore.exe process.

Can someone please verify my results? I use W XP SP2, IE 7  IE 6 (standalone 
IE)

We have code to remove all memory
 leak-able code, but if it's reloading too fast, it may never get to
 that point.

How does this work? There is some onunload code that cleans things up? Can I 
put my own code to window.onunload?

Thanks for answering,
M.

  Původní zpráva 
 Od: John Resig [EMAIL PROTECTED]
 Předmět: Re: [jQuery] Memory leak in blank index.htmljquery
 Datum: 13.2.2007 16:19:27
 
 How fast are you reloading? We have code to remove all memory
 leak-able code, but if it's reloading too fast, it may never get to
 that point.
 
 To our understanding, jQuery doesn't have any known leak points. What
 version of jQuery are you using?
 
 --John
 
 On 2/13/07, Michal.Till [EMAIL PROTECTED] wrote:
  Hi all,
 
  I was investigating a memory leak in my application and unfortunately
 everything led to jQuery. So I created this simple HTML file:
 
  html
  head
   script src=packages/jquery/jquery-latest.pack.js /script
  /head
  body test /body
  /html
 
  Then I started Drip, the IE Leak Detector
 (http://outofhanwell.com/ieleak/index.php?title=Main_Page) and hit the
 auto-refresh button. I was very surprised while viewing the memory consumption
 in Process Explorer (by SysInternals, now Microsoft) (the private bytes 
 graph,
 that is the real allocated memory). It was climbing up and up and up... about
 0.2-0.5 MB each reload. (I like the Process Explorer more than the memory 
 graph
 provided by Drip).
 
  Remember, Drip is far from 100% reliable. It's function Show DOM leaks 
  shows
 only some and even if it shows nothing, the app can be still leaky. Actually, 
 it
 showd one element leaking, that one mentioned in
 http://jquery.com/dev/bugs/bug/705/ . I don't know how this bug was resolved 
 and
 I think that it's not connected with the general leak in the upper code. If I
 add the line suggested in mentioned bug site, this record of leaking SCRIPT
 id=__ie_init src=//: defer __drip_hooked=true/SCRIPT goes away, but as 
 I
 said, AFAIK it has nothig to do with the main problem.
 
  Thanks for answering,
  Michal Till
 
  ___
  jQuery mailing list
  discuss@jquery.com
  http://jquery.com/discuss/
 
 
 ___
 jQuery mailing list
 discuss@jquery.com
 http://jquery.com/discuss/
 
 
 

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