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Posted to issues@arrow.apache.org by "Maarten Breddels (Jira)" <ji...@apache.org> on 2020/06/01 17:47:00 UTC
[jira] [Commented] (ARROW-8990) [C++] Benchmark hash table against
thirdparty options, possibly vendor a thirdparty hash table library
[ https://issues.apache.org/jira/browse/ARROW-8990?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17121205#comment-17121205 ]
Maarten Breddels commented on ARROW-8990:
-----------------------------------------
FYI, I've been using that library and [https://github.com/skarupke/flat_hash_map] for Vaex. After some benchmarking settled for the tsl one, but my research/benchmark wasn't very thorough, because the idea was I could easily switch if needed. But because the performance was great, I never looked back actually, so I'd be interested in the benchmark result.
By the same author, the [https://github.com/Tessil/hat-trie] library can also be very interesting to take a look at.
> [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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