https://puntoblogspot.blogspot.com/2016/06/til-toggle-tracing-defuns-with-slime.html
puntoblogspot: TIL: Toggle tracing defuns with slime
A nice and quick way to trace/untrace defuns from slime: (define-key slime-mode-map (kbd "C-c t") 'slime-toggle-trace-fdefinition)
tiltoggletracingslime