;;; running like this:
;;; ./arp-boats.scm -:g -:hm8M 2>&1 | grep resize -C 5

(define state '())

(let loop ()
  (set! state (alist-update (random 10000) (make-string 1000) state))
  (loop))

;; and you will *sometimes* see:
;; [GC] resized heap to 8388608 bytes
;; [GC] (new) fromspace: 	start=0x0000000001846560, 	limit=0x0000000001c46560
;; [GC] (new) tospace:   	start=0x0000000001046540, 	limit=0x0000000001446540
;; [GC] (old) fromspace: 	start=0x0000000001846560, 	limit=0x0000000001c46560
;; [GC] (old) tospace:   	start=0x0000000001046540, 	limit=0x0000000001446540
;; going on in a loop after about 4 seconds.

;; other times, you might see 
;;[panic] out of memory - heap full while resizing - 
;; execution terminated
;; and the program exiting (good thing, I suppose?)