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https://issues.apache.org/jira/browse/ARROW-8990?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Wes McKinney updated ARROW-8990:
--------------------------------
    Description: 
While we have our own hash table implementation, it would be worthwhile to set 
up some benchmarks so that we can compare against std::unordered_map and some 
other thirdparty libraries for hash tables to know whether we should possibly 
use a thirdparty library. See e.g.

https://tessil.github.io/2016/08/29/benchmark-hopscotch-map.html

Libraries to consider: 

* https://github.com/sparsehash/sparsehash

  was:
While we have our own hash table implementation, it would be worthwhile to set 
up some benchmarks so that we can compare against std::unordered_map and some 
other thirdparty libraries for hash tables to know whether we should possibly 
use a thirdparty library. See e.g.

https://tessil.github.io/2016/08/29/benchmark-hopscotch-map.html


> [C++] Benchmark hash table against thirdparty options, possibly vendor a 
> thirdparty hash table library
> ------------------------------------------------------------------------------------------------------
>
>                 Key: ARROW-8990
>                 URL: https://issues.apache.org/jira/browse/ARROW-8990
>             Project: Apache Arrow
>          Issue Type: Improvement
>          Components: C++
>            Reporter: Wes McKinney
>            Priority: Major
>
> While we have our own hash table implementation, it would be worthwhile to 
> set up some benchmarks so that we can compare against std::unordered_map and 
> some other thirdparty libraries for hash tables to know whether we should 
> possibly use a thirdparty library. See e.g.
> https://tessil.github.io/2016/08/29/benchmark-hopscotch-map.html
> Libraries to consider: 
> * https://github.com/sparsehash/sparsehash



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