Dandandan commented on pull request #8748:
URL: https://github.com/apache/arrow/pull/8748#issuecomment-744040750


   @jorgecarleitao 
   I checked out the branch locally and ran it, the implementation 
unfortunately causes a ~40x slowdown on a query that includes a join (I double 
checked that I was running in release mode):
   
   Query 12 iteration 0 took 51340 ms
   Query 12 iteration 1 took 53788 ms
   Query 12 iteration 2 took 53361 ms
   
   


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