diff --git a/runtime/doc/todo.txt b/runtime/doc/todo.txt
index cad2e98..41326a9 100644
--- a/runtime/doc/todo.txt
+++ b/runtime/doc/todo.txt
@@ -1085,7 +1085,6 @@
 - using NSIS 2.46: install on Windows 7 works, but no "Edit with Vim" menu.
    Use register_shell_extension()? (George Reilly, 2010 May 26)
    Ron's version: http://dev.ronware.org/p/vim/finfo?name=gvim.nsi
-- Undo code: use union to store long in place of pointers?
 - Also crypt the swap file, each block separately.  Change mf_write() and
     mf_read().  How to get b_p_key to these functions?
     Generate seed for each block, store in pointer block.  Block 1 is not
@@ -1095,8 +1094,11 @@
     Verify recovery works.
 - Update for crypt code to use salt. (Mohsin May 30)
     Make the strengthen_key value configurable and store it in the header.
-- Do profiling on sha256 code to find obvious bottlenecks.
 - Do profiling on crypt code to find obvious bottlenecks.
+    bf_ranbyte() and bf_ofb_init() are called for each byte, can they be done
+    inline somehow?
+    -> Add a function in blowfish.c to process an array, called once from
+       crypt_decode() and crypt_encode().
 Patches to include:
 - Include conceal patch?
   http://vince.negri.googlepages.com/