diff --git a/TODO b/TODO
index e7943307..3032392e 100644
--- a/TODO
+++ b/TODO
@@ -36,6 +36,8 @@ OPTIMIZATIONS
 * SORT: Don't copy the list into a vector when BY argument is constant.
 * Write the hash table size of every db in the dump, so that Redis can resize the hash table just one time when loading a big DB.
 * Read-only mode for slaves.
+* Redis big lists as linked lists of small ziplists?
+  Possibly a simple heuristic that join near nodes when some node gets smaller than the low_level, and split it into two if gets bigger than high_level.
 
 REPORTING
 =========