[GitHub] [systemds] Baunsgaard opened a new pull request #1181: [SYSTEMDS-???] New ColGroup SDC Sparse Dictionary enCoding

Tue, 09 Feb 2021 14:08:52 -0800 


Baunsgaard opened a new pull request #1181:
URL: https://github.com/apache/systemds/pull/1181


   This PR contains a new column group type.
   The basic reasoning for this new type is to improve performance, not the 
compression ratio.
   
   Before:
   
![image](https://user-images.githubusercontent.com/9947148/107434871-a622db00-6b2b-11eb-8ba7-fcf7e3021215.png)
   
   After:
   
![image](https://user-images.githubusercontent.com/9947148/107434909-b6d35100-6b2b-11eb-9fbf-17ffbc4a94c8.png)
   


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