diff --git a/TODO.md b/TODO.md
index 240fbdd..c2f70b1 100644
--- a/TODO.md
+++ b/TODO.md
@@ -9,9 +9,16 @@
 [ ] Fixed point computation?
 
 # Cache
-[X] Rotate per channel -> no gain
+[-] Rotate per channel -> no gain
 [ ] Load pixels in uint64-t
-[ ] Cut image in tiles
+[X] Cut image in tiles
+ [ ] Overlap?
+ [ ] Rotate in one temp tile then copy/move it
+[-] Align memory -> no gain
 
 # Quality
 [X] Interpolate using SIMD, SSE (no big gain)
+[ ] Image borders
+
+# Bugs
+[ ] first tile on each row is missing