Smart Key - Profiler Report Mode ​

bash
If pressed within a profiler-report buffer which displays Emacs Lisp
percentage CPU time and memory usage across a recorded period:
  ACTION KEY
    (1) on the text of a linked call tree item, jumps to the definition
        of the item;
    (2) on or after the last line in the buffer, quits from the profiler
        report.
  ASSIST KEY
    (1) on an item line, toggles exposure of the item’s call tree.
    (2) on or after the last line in the buffer, quits from the profiler
        report.