alamb commented on pull request #810:
URL: https://github.com/apache/arrow-rs/pull/810#issuecomment-931730985


   @jorgecarleitao  / @nevi-me  / @jhorstmann  do you have any concerns with 
this approach before I spent more time filling in the details for nested / 
compound structures (`List`, `Dictionary`, etc)?
   
   For some of the structures, the actual data will likely need to be inspected 
(to ensure, for example, that the values in the offsets buffer of utf8 arrays 
are valid).
   
   I am not sure about the performance impact of doing these validations -- if 
it turns out to be too great, I can imagine having a "trusted" version of 
`ArrayData::new()` (only callable within the `arrow` crate) or feature flagging 
the validation so it can be disabled for those users who chose to do so
   
   


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