Plotting is just eating my system... :)

I just maximized maxima window and then I did:
f(x) := x / (x + 1);
plot2d(f(x), [x, -10, 10]);

And the lisp process on which maxima is running is eating my cpu time
and slowly eating all of my memory. Why is this?

Before this email was written:
  PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND
11244 pmatos    25   0 1284m  75m  35m R 94.5 15.1   2:09.92 lisp

After this email was written:
  PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND
11244 pmatos    25   0 1284m 137m  35m R 95.5 27.3   4:14.62 lisp



Any ideas?

Cheers,
-- 

Paulo J. Matos : pocm [_at_] mega . ist . utl . pt
Instituto Superior Tecnico - Lisbon
Computer and Software Eng. - A.I.
 - > http://mega.ist.utl.pt/~pocm
---
        -> God had a deadline...
                So, he wrote it all in Lisp!