Ted-Jiang commented on PR #2393:
URL: https://github.com/apache/arrow-rs/pull/2393#issuecomment-1212855743

   After 
[98c9ab3](https://github.com/apache/arrow-rs/pull/2393/commits/98c9ab375f20f934f3088c87df0829a75d21ffce)
   
   there is no performance downgrade and avoid allocate large buffer when skip 
large amount values.
   ```
   arrow_array_reader/Int32Array/binary packed skip, mandatory, no NULLs        
                                                                     
                           time:   [38.054 us 38.268 us 38.506 us]
                           change: [-4.6824% -3.3258% -2.0893%] (p = 0.00 < 
0.05)
                           Performance has improved.
   Found 8 outliers among 100 measurements (8.00%)
     4 (4.00%) low mild
     3 (3.00%) high mild
     1 (1.00%) high severe
   arrow_array_reader/Int32Array/binary packed skip, optional, no NULLs         
                                                                    
                           time:   [47.428 us 47.588 us 47.769 us]
                           change: [-2.8683% -1.4678% +0.0342%] (p = 0.05 < 
0.05)
                           Change within noise threshold.
   Found 15 outliers among 100 measurements (15.00%)
     3 (3.00%) low mild
     6 (6.00%) high mild
     6 (6.00%) high severe
   
   ```


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