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https://issues.apache.org/jira/browse/MAHOUT-1191?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13632363#comment-13632363
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Jake Mannix commented on MAHOUT-1191:
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Ok, so I'm trying to wrap my head around _how_ RASV could ever get nearly as
fast as SASV for dot products (or vector sums, for that matter). Is it because
the load factor we use in OpenIntDoubleHashMap is 1.2, and so the overall
number of nonzeroes is roughly the same as the size of the backing arrays, and
the only slowdown OIDHM has over OrderedIntDoubleMapping is that the former
needs to quickly check the states array to verify it's in state FULL?
Numbers don't lie, unless they come from microbenchmarks, in which case they
tell... "selective truths" shall we say.
> Cleanup Vector Benchmarks make it less variable
> -----------------------------------------------
>
> Key: MAHOUT-1191
> URL: https://issues.apache.org/jira/browse/MAHOUT-1191
> Project: Mahout
> Issue Type: Bug
> Reporter: Robin Anil
> Assignee: Robin Anil
> Attachments: MAHOUT-1191.patch
>
>
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