Github user vrilleup commented on the pull request:
https://github.com/apache/spark/pull/964#issuecomment-48547393
@mengxr I ran one of the large size jobs again, per multiplication time
increased to 8 seconds from 2 seconds (the version before yesterday). I don't
know which part was the cause (shouldn't be the axpy part because I already
compared this). Will submit a patch after identifying the cause.
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