[Javascript] AJAX app causing excessive browser memory usage

[Matt Warden]

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Rick Emery wrote:
>>> xmlList = null;
>>
>> Keep this one.
> 
> Why wouldn't this, like the others, happen when it fell out of scope 
> (i.e., when the handleELResponse() function exited)?

In your example it looked like this was in global scope.

>> Well you're creating a new XHR object every 30 seconds. Not a problem if
>> you're handling its destruction properly, but I have a hunch you are not.
> 
> 
> I'm actually not creating a new one every 30 seconds; I create the xhr 
> object when the page first loads, and reuse it every 30 seconds to  send
> the request (and process the response).

I would suggest not doing this. The object is meant to represent a
request, not a connection. At minimum, the object and all its request
and response content must remain in memory indefinitely rather than only
for x milliseconds while you do your processing. At worst, the designers
of the object assumed a short lifecycle and coded accordingly.


- --
Matt Warden
Oxford, OH, USA
http://mattwarden.com


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