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https://issues.apache.org/jira/browse/MAHOUT-1148?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13570876#comment-13570876
]
Hudson commented on MAHOUT-1148:
--------------------------------
Integrated in Mahout-Quality #1854 (See
[https://builds.apache.org/job/Mahout-Quality/1854/])
MAHOUT-1148 - Demonstrate speedup (Revision 1442436)
MAHOUT-1148 - Re-implemented QR decomposition. On a 60x60 random matrix it is
about 8x faster now after the JIT warms up (takes 100 or so decompositions).
(Revision 1442428)
Result = FAILURE
tdunning :
http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1442436
Files :
*
/mahout/trunk/math/src/main/java/org/apache/mahout/math/OldQRDecomposition.java
* /mahout/trunk/math/src/main/java/org/apache/mahout/math/QR.java
* /mahout/trunk/math/src/main/java/org/apache/mahout/math/QRDecomposition.java
*
/mahout/trunk/math/src/test/java/org/apache/mahout/math/QRDecompositionTest.java
tdunning :
http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1442428
Files :
*
/mahout/trunk/math/src/main/java/org/apache/mahout/math/OldQRDecomposition.java
* /mahout/trunk/math/src/main/java/org/apache/mahout/math/QRDecomposition.java
*
/mahout/trunk/math/src/test/java/org/apache/mahout/math/OldQRDecompositionTest.java
*
/mahout/trunk/math/src/test/java/org/apache/mahout/math/QRDecompositionTest.java
> QR Decomposition is too slow
> ----------------------------
>
> Key: MAHOUT-1148
> URL: https://issues.apache.org/jira/browse/MAHOUT-1148
> Project: Mahout
> Issue Type: Bug
> Reporter: Ted Dunning
>
> A user reported that QR decomposition is too slow. I coded up a replacement
> that can be 10x faster under certain cases and the new version is also tested.
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