In hotspot view a blue dot signifies a hotspot and the default sort is sorted by "own time" descending. In between the blue dot lines are gray dots and lines which seem to be taking up quite a bit of time as well. Why are these not hot spots? Also I'm profiling in sampling mode with thread time and while the hot spots are fairly reliably the same areas between various snapshots the gray dots/lines vary quite a bit. So I'm wondering what to really make of them.