TODO note.

TODO

@@ -8,6 +8,8 @@
 * Voir si ça coûte cher de stocker la taille de la pile dans
   chaque cellule; voir si les appels à Log coûtent cher
 
+* Could we avoid a special case for the first call to read()?
+
 * Changes that could be applied to the code back-end:
     [action] could now be inlined into [run]
     [initiate] and [bookkeeping] could be merged?