validation and profiles

lib/reversals/pivotfib/Pivotfib.md

@@ -63,6 +63,37 @@ Pivotfib.BatchAll(high, low, close, ppOut, r1Out, s1Out, r2Out, s2Out, r3Out, s3
 | **PIVOTEXT** (Extended) | Arithmetic extended | 11 | 1×–4× range |
 | **PIVOTDEM** (DeMark) | Conditional X/4 | 3 | Direction-based |
 
+
+## Performance Profile
+
+### Operation Count (Streaming Mode)
+
+PivotFib computes PP and 6 Fibonacci S/R levels from previous bar's HLC — O(1) pure arithmetic.
+
+| Operation | Count | Cost (cycles) | Subtotal |
+| :--- | :---: | :---: | :---: |
+| Store prev bar HLC | 3 | 1 cy | ~3 cy |
+| PP = (H + L + C) / 3 | 1 | 2 cy | ~2 cy |
+| range = H - L | 1 | 1 cy | ~1 cy |
+| R1/S1 via FMA (0.382 * range) | 2 | 1 cy | ~2 cy |
+| R2/S2 via FMA (0.618 * range) | 2 | 1 cy | ~2 cy |
+| R3/S3 = PP +/- range | 2 | 1 cy | ~2 cy |
+| NaN guard + state update | 1 | 2 cy | ~2 cy |
+| **Total** | **O(1)** | — | **~14 cy** |
+
+Pure O(1) arithmetic on previous-bar data. Fibonacci multipliers 0.382 and 0.618 are precomputed constants; FMA fuses multiply-add into a single instruction.
+
+### Batch Mode (SIMD Analysis)
+
+| Operation | Vectorizable? | Notes |
+| :--- | :---: | :--- |
+| PP computation | Yes | Vector<double> (H+L+C)/3 across all bars |
+| Range calculation | Yes | Vector subtract H-L |
+| Fibonacci level projection | Yes | FMA with broadcast constants 0.382, 0.618 |
+| All 7 output spans | Yes | Full SIMD pass — no data dependencies |
+
+Excellent SIMD candidate — all 7 output levels are independent. BatchAll span overload processes 4 bars per AVX2 cycle. Expected 4× throughput vs scalar.
+
 ## Implementation Details
 - **WarmupPeriod**: 2 bars (need previous bar's HLC)
 - **Parameters**: None