(define (test-run)
(let ((ret 0))
(do ((i 0 (+ i 1)))
((>= i 10000000) ret)
(set! ret (+ ret i)))))
(display (test-run))
(newline)
(define (test-run)
(let ((ret 0))
(do ((i 0 (+ i 1)))
((>= i 10000000) ret)
(set! ret (+ ret i)))))
(display (test-run))
(newline)