On Tue, Jun 10, 2014 at 9:58 PM, Ilya Kantor <ilia...@gmail.com> wrote:
> Hi,
>
> When I create many objects new Machine like this
> ```
> function Machine(power) {
> var enabled = false;
>
> this.enable = function() {
> enabled = true;
> };
> this.disable = function() {
> enabled = false;
> };
> }
>
> var machines = []
> for(var i=0; i<10000; i++) machines.push(new Machine)
> ```
>
> ...I see in Chrome Heap Profile that every object has 36 bytes for function
> enable/disable.
> That is so even if the function code is actually longer.
>
> Do I get it right that V8 actually creates these functions only ONE time and
> uses it for all machines?
That's correct, there is only one function. Those 36 byte instances
that you're seeing are closure environments for the captured variable.
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