example code using profile and graphviz

render-example.rkt

#lang racket

(require profile
         (prefix-in gv: profile/render-graphviz))

(define (f)
  (sleep 0.5)
  (+ (g) (h)))

(define (g) (sleep 0.5) 13)
(define (h) (sleep 0.5) 14)


(profile-thunk
 #:render gv:render
 (lambda ()
   (f)
   (newline)))