diff --git a/doc/TODO.021 b/doc/TODO.021
index 6bca516844..82521e0f87 100644
--- a/doc/TODO.021
+++ b/doc/TODO.021
@@ -242,6 +242,8 @@ N   . Draft proposal for GeoIP aggregation (see external constraints *)
   - Use less bandwidth
     - Use if-modified-since to download consensuses
   - Handle multi-core cpus better
+    - Split circuit AES across cores?
+    - Split TLS across cores?  This will be harder.
   - Use information from NETINFO cells
     - Don't extend a circuit over a noncanonical connection with
       mismatched address.