TODO.md in vedeu-0.8.7 vs TODO.md in vedeu-0.8.8

@@ -1,4 +1,12 @@
 ## 2016-01-16
 
 - Add Vedeu::Index which converts a Vedeu::Point to an array index.
   i.e. Never less than 0, always 1 less than the Vedeu::Point value.
+
+## 2016-01-11
+
+- Investigate the differences between memoizing in
+  Vedeu::Geometries::Geometry#area and not memoizing. Memoizing saves
+  ~80ms on running test suite and considerably impacts app
+  responsiveness, however changes to the geometry (such as movement or
+  maximising) are not reflected.