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Posted to github@arrow.apache.org by GitBox <gi...@apache.org> on 2022/11/02 19:41:03 UTC

[GitHub] [arrow-datafusion] metesynnada commented on pull request #4079: Replace RwLock and Mutex by using DashMap

metesynnada commented on PR #4079:
URL: https://github.com/apache/arrow-datafusion/pull/4079#issuecomment-1301132871

   > I'm surprised any of these data structures are contended, and so dashmap is unlikely to yield benefits here? It may even be slower.
   > 
   > Do you have any benchmark results you could share?
   
   Actually, it is better in most use cases. You can [check ](https://github.com/xacrimon/conc-map-bench). It is quite similar to Java's [ConcurrentHashMap](https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/ConcurrentHashMap.html).


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