On 12/25/10, Balázs Galambosi <galambal...@gmail.com> wrote:
> 2010/12/25 Garrett Smith <dhtmlkitc...@gmail.com>:
>>> In this case, I still have a memory leak?
>> Yes, you do. But what are you doing there?
>
> Alright. Now I'm not sure what the real code in Yu's head looks like,
> but when I first read I thought he meant something like:
>
> function outer() {
> var div = document.createElement("div");
> // do something with div
> // ...
> function inner() {
> var a,b,c;
> // do something without div
> // ...
> }
> outer = inner;
> return inner();
> }
>
> There is no leak in this case. The memory usage is stable
> in IE for 10 000 calls: http://jsbin.com/oriqa4/
>
There is a leak of exactly one `div`, which cannot be GC'd. If the
only reference the dom element is `div`, then setting `div` to null
means nothing is pointing at that element, making it eligible for GC.
A leak of exactly one div means that memory won't increase on
subsequent calls. Memory usage should therefore be stable and not
increase.
--
Garrett
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