Hi Ben,
Is that somehow related with "Hidden classes" for objects or that's a
completely another optimization technique?
среда, 11 июня 2014 г., 0:29:07 UTC+4 пользователь Ben Noordhuis написал:
>
> On Tue, Jun 10, 2014 at 9:58 PM, Ilya Kantor <ili...@gmail.com
> <javascript:>> 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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