Github user MLnick commented on the pull request:
https://github.com/apache/spark/pull/10152#issuecomment-162503043
@ygcao can we remove the code changes related to the `cosineSimilarity` and
`findSynonyms`? This will make it cleaner so we can focus on the core issue
(see my next comment).
Also, I think that things like distance metrics should live in a
centralized place, and so changes to these are outside the scope of this
particular model and the PR. In fact, the original `cosineSimilarity` method
(https://github.com/apache/spark/blob/master/mllib/src/main/scala/org/apache/spark/mllib/feature/Word2Vec.scala#L472)
is no longer used, as it's been replaced by a more efficient version, so we
should consider deprecating it (or indeed just removing it as it's private and
always has been).
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