Github user pwendell commented on the pull request:
https://github.com/apache/spark/pull/5843#issuecomment-101952647
Okay I did another pass.
Only one comment left. I noticed there is a limit to how far I can zoom
outwards. For instance I could not get the entire stage visualized in one view
of the timeline when I ran this:
```
val rdd = sc.parallelize(1 to 100000, 1000).map(x => (x, x)).reduceByKey(_
+ _).cache.count()
```
Why don't we just set `maxZoom` equal to the difference between the very
first and last task (or maybe like 1.5 of that to get some buffer room)? Right
now it seems like it is trying to constrain the zooming, but my preference was
that it should be unconstrained, otherwise it's pretty confusing user
experience.
Is there a reason you wanted to constrain the maximum?
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