Ted-Jiang commented on issue #3708:
URL: https://github.com/apache/arrow-rs/issues/3708#issuecomment-1429017073

   > Could you provide a link to the benchmark you were running, when this was 
previously proposed the numbers were not nearly so flattering - [#3134 
(comment)](https://github.com/apache/arrow-rs/pull/3134#issuecomment-1328988681)
   > 
   > I'm mainly apprehensive as we already have issues with the amount of 
codegen for the arithmetic kernels 😅
   
   I used `unary_mut `  in datafusion  like
   ``` rust
   pub(crate) fn add_scalar_cow<T>(
       array: PrimitiveArray<T>,
       scalar: T::Native,
   ) -> Result<PrimitiveArray<T>, ArrowError>
   where
       T: ArrowNumericType,
       T::Native: ArrowNativeTypeOp,
   {
       match unary_mut(array, |value| value.add_wrapping(scalar)) {
           Ok(array) => Ok(array),
           // Fall back need copy array
           Err(array) => add_scalar(&array, scalar),
       }
   }
   ```
   But there a lot code change during that time, like support 
dictionaryArray.... So i try to modify less api in datafusion, support 
`unary_dyn_mut `


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