1 files changed, 8 insertions, 0 deletions

diff --git a/README.md b/README.md
index e9f317e..ef7e82e 100644
--- a/README.md
+++ b/README.md
@@ -2,3 +2,11 @@
 swift build -c release
 ./.build/release/pixel-sort input.png output2.png --lower 0.2 --upper 0.8 --key brightness
 ```
+
+Performance target: 2ms max for 1080p
+
+Shader optimization bottlenecks:
+- VRAM
+- Shader code itself
+    - Texture sampling (memory bandwidth): precalculate sorting value (SortKey)
+    -