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https://issues.apache.org/jira/browse/MAHOUT-148?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12762673#action_12762673
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Jake Mannix commented on MAHOUT-148:
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Another good reason to do this is HADOOP-6109 - which will be fixed in 0.21,
but right now causes pretty severe problems in dealing with "big" lines of Text
(i.e. they 0.20 and before LineReader uses an O(n^2) algorithm for char[]
copying when appending)
> Convert Classification Algs to use richer Writable syntax
> ---------------------------------------------------------
>
> Key: MAHOUT-148
> URL: https://issues.apache.org/jira/browse/MAHOUT-148
> Project: Mahout
> Issue Type: Improvement
> Components: Classification
> Affects Versions: 0.1, 0.2
> Reporter: Grant Ingersoll
> Assignee: Robin Anil
> Fix For: 0.2
>
> Attachments: MAHOUT-148-Work-In-Progress.patch
>
>
> Much of the classification capabilities relies on parsing values out from the
> Text object just to determine what type of "thing" is being used. We should
> try to avoid having to do string manipulation for this kind of thing and
> instead encapsulate it in Writable instances. This should make things
> perform faster and bring stronger typing to the problem, which should make it
> easier to understand and debug the code.
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