Are frozen Objects faster ?

Andreas Rossberg rossberg at
Thu Feb 14 10:38:38 PST 2013

On 14 February 2013 19:26, Herby Vojčík <herby at> wrote:
> I meant "de facto". People wanting to remove property bar from foo do not
> write `delete` anymore; they (at least some significant subset) have
> learned to write ` = null;` or ` = undefined;`. The reason is
> perf - `delete` deoptimized hidden classes.

And with ES6, those people will hopefully realise that for those
cases, using a Map is a cleaner alternative anyway.


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