You aren't comparing lengths in a sunburst -- you're comparing angles. A sunburst is a flame graph using polar coordinates. And that a slice with a smaller angl

You aren't comparing lengths in a sunburst -- you're comparing angles. A sunburst is a flame graph using polar coordinates. And that a slice with a smaller angle (value) but a deeper depth (from the root) is printed visually larger than a slice closer to the root is confusing. A flame graph box at different depths can be compared directly.