alamb commented on issue #6692:
URL: https://github.com/apache/arrow-rs/issues/6692#issuecomment-2483455248

   > > This line of code extends buffer (byte copied) regardless of the 
filtered result, I think it is the reason why we need gc. If we do append_value 
here, we have additional hash lookup and insert, but less buffer copied 
especially in low selectivity and no gc required later on.
   > 
   > Didn't see improvement on this approach 
[apache/datafusion#13450](https://github.com/apache/datafusion/pull/13450)
   
   I didn't have a chance to full look at 
https://github.com/apache/datafusion/pull/13450 -- can you summarize what 
approach it implemented?


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