You mean like structs and arrays? I made this which doesn't depend on 
proxies  https://github.com/Benvie/reified. 

On Friday, May 25, 2012 8:35:36 PM UTC-4, m1k3l wrote:
>
> Nice Brandon.
>
> One thing I started thinking about but didn't find a good framework yet is 
> to define structures in Typed Arrays. DataView can be used for that but 
> this is really awkward. Looks like your advanced buffers may be extended 
> for that?
>
> On Monday, April 16, 2012 1:12:12 PM UTC-7, Brandon Benvie wrote:
>>
>> I'm curious on the performance on DataViews which I read weren't as 
>> optimized as the array buffers themselves. I created this lib  
>> https://github.com/Benvie/view-buffer which uses DataView to actually 
>> execute reading and writing. I've found providing indexed member access is 
>> a place where Proxies shine in that they a.) don't seem to suffer much or 
>> any performance penalty compared to native implementation, and b.) full JS 
>> implementation so easier to reason about. 
>>>
>>>

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