Github user jkbradley commented on the pull request:
https://github.com/apache/spark/pull/2595#issuecomment-58460850
@chouqin @mengxr @manishamde I updated the timing results above. Sorry
it took this long, but I kept running into various issues. (The problems with
the original results were from mixed-up row orders + additional running time
from missing Hadoop logging configuration files.)
The trends I see are:
* more features => better speedups from dist-agg
* more trees => fewer features => worse speedups
Conclusion: For all of the larger problems (with more features), dist-agg
helps.
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