Github user andrewor14 commented on the pull request:
https://github.com/apache/spark/pull/5547#issuecomment-94585961
@pwendell talked about this and #2342 a little bit offline. Our feeling is
that this is a more elegant representation of task times than #2342, especially
when there are many tasks within a stage. One concern I have, however, what
happens when you zoom (does it currently support zooming?). It would make
little sense to zoom without keeping the axes, but my impression is that
implementing this is pretty hard since we're directly using d3.
Bonus: It doesn't have to be part of this patch, but it would really cool
if there's a mode where we can align the breakdown of the task times along the
vertical axis. Right now you can't really compare the serialization time of the
first task with that of the last task, let alone track whether it has grown
incrementally over time. Realistically we will implement this separately say
for 1.5, but I imagine this bonus feature is gonna be immensely useful.
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