Are frozen Objects faster ?

David Bruant bruant.d at
Thu Feb 14 10:22:44 PST 2013

Le 14/02/2013 19:08, Mark S. Miller a écrit :
> On Thu, Feb 14, 2013 at 10:01 AM, Kevin Gadd <kevin.gadd at 
> <mailto:kevin.gadd at>> wrote:
>     Frozen and sealed objects are both dramatically slower in most JS
>     engines I've tested. In the ones where they're not dramatically slower
>     they are never faster.
>     The last time I asked on the mozilla and v8 bug trackers I was
>     informed that there is no plan to optimize for these features and that
>     the design of the respective JS engines would make such optimizations
>     difficult anyway.
>     (I find this extremely unfortunate.)
> Likewise. And unlikely.
> Based on history, I suggest that the best way to get this situation 
> fixed is benchmarks.
Agreed 100%

> Either create a new benchmark or a variation of an existing benchmark. 
> For example, if someone created a variant of SunSpider in which all 
> objects that don't need to not be frozen were frozen, and posted the 
> measurements, that would help get everyone's attention. The situation 
> might then improve rapidly.
Choice of the specific benchmark aside, this is a very good idea. This 
could also be applied to strict mode.

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