; cat x.cpp
#include <stdio.h>
void foo() { throw 1; }
int main() {
  for(int i = 0; i < 1000000; ++i) {
    try { foo(); }
    catch(...) {}
  }
}
; c++ x.cpp -o a.out
; time ./a.out
8.230u 0.010s 8.204r 	 ./a.out
; cat x.scm
(define (foo k) (k 123))

(let loop ((i 0))
  (if (>= i 1000000)
      (begin
        (call-with-current-continuation
          (lambda (k) (foo k)))
        (loop (+ i 1)))))
; csc x.scm -o a.out
; time ./a.out
0.010u 0.000s 0.010r 	 ./a.out

; cat x.scm
(define (foo k) (k 123))

(let loop ((i 0))
  (if (< i 1000000)
      (begin
        (call-with-current-continuation
          (lambda (k) (foo k)))
        (loop (+ i 1)))))
; csc x.scm -o a.out
; time ./a.out
0.330u 0.000s 0.321r 	 ./a.out