2 files changed, 11 insertions, 0 deletions

diff --git a/README.md b/README.md
index 4d6f984..d1a0961 100644
--- a/README.md
+++ b/README.md
@@ -8,4 +8,15 @@ TODO:
 * coordinates: co, eo, epsep, cpsep_sym, cocpsep_sym, cphtr_sym, cocphtr_sym
 * pruning tables (1 bit per entry + fallback)
 * solve.c
+
+Optimizations:
+
+* multi-move (up to 4/5 moves at once)
 * avx2_cube.c
+
+Things I need to learn:
+
+* Use AVX2 instructions, in particular
+  [_mm256_shuffle_epi8](https://www.intel.com/content/www/us/en/docs/cpp-compiler/developer-guide-reference/2021-10/mm256-shuffle-epi8.html))
+* Inspect compiled assembly
+* Use valgrind tool cachegrind and other profiling tools
diff --git a/src/array_cube.c b/src/cube_array.c
index 3445658..3445658 100644
--- a/src/array_cube.c
+++ b/src/cube_array.c