sx

a small lisp with closures, cons cells, and a garbage collector. step through the bytecode and watch the heap while it runs.

source example
space to step
output

      

    


    

      

        

          
current instruction

          
-

        

        

          
call stack (frames)

          

        

      

      

        

          heap 
        

        

           unreached
           reachable (marked)
           just collected