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https://issues.apache.org/jira/browse/MAHOUT-862?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13142301#comment-13142301
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Dawid Weiss commented on MAHOUT-862:
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bq. getLong works really well on ByteBuffers
That's probably because it's an intrinsic reading in 8 bytes at a time without
bounds checking, but I'd have to confirm that by looking at the jitted code
dump (or in openjdk code). Put at the end of my todo list for tonight ;)
> MurmurHash 3.0
> --------------
>
> Key: MAHOUT-862
> URL: https://issues.apache.org/jira/browse/MAHOUT-862
> Project: Mahout
> Issue Type: Improvement
> Reporter: Grant Ingersoll
> Assignee: Grant Ingersoll
> Priority: Minor
> Attachments: MAHOUT-862.patch
>
>
> Yonik has ported an implementation of MurmurHash 3.0 and put it in the public
> domain: http://www.lucidimagination.com/blog/2011/09/15/murmurhash3-for-java/
> It's a port of https://sites.google.com/site/murmurhash/ which says:
> {quote}
> (I reserve the right to tweak the constants after people have had a chance to
> bang on it). Murmur3 has better performance than MurmurHash2, no repetition
> flaw, comes in 32/64/128-bit versions for both x86 and x64 platforms, and the
> 128-bit x64 version is blazing fast - over 5 gigabytes per second on my 3
> gigahertz Core 2.
> In addition, the library of test code that I use to test MurmurHash (called
> SMHasher) has been released - it's still rough (and will only compile under
> VC++ at the moment), but it contains everything needed to verify hash
> functions of arbitrary output bit-lengths.
> Murmur3 and all future versions will be hosted on Google Code here -
> http://code.google.com/p/smhasher/ - you can access the codebase via the
> 'Source' tab at the top.
> {quote}
> See also http://code.google.com/p/smhasher/
> We should add support for it and hook into MinHash
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