tustvold opened a new pull request, #5881:
URL: https://github.com/apache/arrow-datafusion/pull/5881

   # Which issue does this PR close?
   
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   Relates to #5879
   
   # Rationale for this change
   
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   This combines the merge and sort benchmarks together to avoid code 
duplication, it also makes a number of changes to make the benchmarks more 
realistic:
   
   * Each partition / stream now contains multiple batches, an average of 13
   * The sort_merge bench now performs a partitioned sort instead of sorting 
into a single partition and then running a SortPreservingMerge on the single 
partition (which is a no-op)
   * Tuples are sliced and then collected into their output arrays, this 
ensures that DictionaryArray aren't all using the same identical dictionary 
values
   * Merge benchmark is run on sorted data, with the other benchmarks run on 
unsorted data
   * 
   
   # What changes are included in this PR?
   
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   # Are these changes tested?
   
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   # Are there any user-facing changes?
   
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