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Posted to issues@spark.apache.org by "Liang-Chi Hsieh (JIRA)" <ji...@apache.org> on 2014/12/09 11:28:13 UTC

[jira] [Updated] (SPARK-4797) Replace breezeSquaredDistance

     [ https://issues.apache.org/jira/browse/SPARK-4797?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Liang-Chi Hsieh updated SPARK-4797:
-----------------------------------
    Description: 
This PR replaces slow breezeSquaredDistance. A simple calculation involving 40000 squared distances between the vectors of 20000 dims shows:

* breezeSquaredDistance: ~12 secs
* This PR: ~10.5 secs


  was:
This PR replaces slow breezeSquaredDistance. A simple calculation involving 40000 vectors of 20000 dims shows:

* breezeSquaredDistance: ~12 secs
* This PR: ~10.5 secs



> Replace breezeSquaredDistance
> -----------------------------
>
>                 Key: SPARK-4797
>                 URL: https://issues.apache.org/jira/browse/SPARK-4797
>             Project: Spark
>          Issue Type: Improvement
>            Reporter: Liang-Chi Hsieh
>            Priority: Minor
>
> This PR replaces slow breezeSquaredDistance. A simple calculation involving 40000 squared distances between the vectors of 20000 dims shows:
> * breezeSquaredDistance: ~12 secs
> * This PR: ~10.5 secs



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