Github user vlad17 commented on the issue:
https://github.com/apache/spark/pull/14547
@setah do you have any opinion on "loss-based" vs. "auto" or @jkbradley do
you feel strongly about this? I think the trade-off is between being explicit
vs. possibly confusing the user. I prefer being explicit.
@setah one important thing to note is that option 2 is only strictly better
than 1 if we have converged to an optimal terminal node prediction. In log
loss, for example, I only take a single NR step per Friedman.
Finally, apologies to everyone for the delay. I've had some deadlines at
school and am currently traveling, but should be able to address comments when
I get back.
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