Document measured H3ddle performance

README.md

@@ -51,10 +51,18 @@ that assume the original output-major Comfy layout. The original and full
 input-major transformers remain in this repository for users and runtimes that
 want exact Ref2VA weights.
 
-On a 32 GiB M1 Pro, a matched 512x896 reference-conditioned, eight-pass
-generation reduced complete transformer time from 541.2 to 515.3 seconds:
-**4.8%**. Total generation fell from 631.4 to 595.9 seconds, and the generated
-reference output remained good.
+## Measured performance versus the regular layout
+
+On a 32 GiB M1 Pro, using the same prompt, reference, seed, 512x896 canvas,
+eight passes, 50 blocks, and output settings:
+
+| path | transformer | total generation | gain vs regular |
+|---|---:|---:|---:|
+| regular output-major | 541.2 s | 631.4 s | baseline |
+| input-major | 515.3 s | 595.9 s | **4.8% transformer; 5.6% total (1.06x)** |
+
+The generated reference output remained good. Actual gains vary with canvas
+size, memory pressure, and Mac.
 
 ## Compact H3ddle hybrid overlay