chore(bench): refresh results with pYIN and downbeat speedups

- Re-run the benchmark suite on an idle machine to capture the pYIN
  Viterbi and downbeat-refinement speedups.
- Add the new load-average fields written by the updated harness.

Author: libraz

benchmarks/results.json

@@ -6,66 +6,69 @@
   "runs_per_case": 3,
   "methodology": "Both libraries measured 'standalone from raw audio': every per-feature call reconstructs STFT/Mel from the resampled samples. libsonare uses chrono::steady_clock inside C++; librosa uses time.perf_counter around the Python call.",
   "librosa_version": "0.11.0",
+  "hardware_threads": 18,
+  "load_average_before": 1.93,
+  "load_average_after": 1.82,
   "full_analysis": {
-    "libsonare_ms": 1247.05,
-    "bpm_detector_comprehensive_ms": 39891.3,
-    "bpm_detector_speedup": 31.99,
+    "libsonare_ms": 1152.52,
+    "bpm_detector_comprehensive_ms": 34544.97,
+    "bpm_detector_speedup": 29.97,
     "bpm_detector_version": "1.1.0",
     "note": "Full pipeline (BPM + key + beats + chords + sections + timbre + dynamics) running entirely inside libsonare C++. The comparison target is bpm-detector --comprehensive: a pipeline built on librosa, not librosa itself. It is the same author's earlier Python project, chosen because it computes the same set of features end to end; librosa alone has no equivalent one-shot pipeline to time. Ratios against a different librosa-based pipeline will differ."
   },
   "per_feature": [
     {
       "feature": "STFT",
-      "librosa_ms": 16.56,
-      "libsonare_ms": 13.93,
-      "speedup": 1.19
+      "librosa_ms": 12.61,
+      "libsonare_ms": 13.52,
+      "speedup": 0.93
     },
     {
       "feature": "Mel Spectrogram",
-      "librosa_ms": 29.56,
-      "libsonare_ms": 23.31,
-      "speedup": 1.27
+      "librosa_ms": 19.45,
+      "libsonare_ms": 22.23,
+      "speedup": 0.88
     },
     {
       "feature": "HPSS",
-      "librosa_ms": 2129.73,
-      "libsonare_ms": 99.61,
-      "speedup": 21.38
+      "librosa_ms": 1680.69,
+      "libsonare_ms": 81.94,
+      "speedup": 20.51
     },
     {
       "feature": "Onset Strength",
-      "librosa_ms": 32.84,
-      "libsonare_ms": 23.68,
-      "speedup": 1.39
+      "librosa_ms": 20.54,
+      "libsonare_ms": 22.72,
+      "speedup": 0.9
     },
     {
       "feature": "Chroma",
-      "librosa_ms": 66.41,
-      "libsonare_ms": 15.61,
-      "speedup": 4.25
+      "librosa_ms": 41.99,
+      "libsonare_ms": 14.78,
+      "speedup": 2.84
     },
     {
       "feature": "Beat Track",
-      "librosa_ms": 38.62,
-      "libsonare_ms": 57.95,
-      "speedup": 0.67
+      "librosa_ms": 32.88,
+      "libsonare_ms": 54.95,
+      "speedup": 0.6
     },
     {
       "feature": "MFCC",
-      "librosa_ms": 23.42,
-      "libsonare_ms": 24.05,
-      "speedup": 0.97
+      "librosa_ms": 20.8,
+      "libsonare_ms": 23.01,
+      "speedup": 0.9
     },
     {
       "feature": "pYIN",
-      "librosa_ms": 6172.96,
-      "libsonare_ms": 1644.89,
-      "speedup": 3.75
+      "librosa_ms": 5461.02,
+      "libsonare_ms": 427.89,
+      "speedup": 12.76
     },
     {
       "feature": "Spectral Centroid",
-      "librosa_ms": 26.41,
-      "libsonare_ms": 19.24,
+      "librosa_ms": 24.86,
+      "libsonare_ms": 18.12,
       "speedup": 1.37
     }
   ]

benchmarks/results_cpp.json

@@ -5,27 +5,27 @@
   "resampled_sample_rate": 22050,
   "runs_per_case": 3,
   "hardware_threads": 18,
-  "load_average_before": 3.33,
-  "load_average_after": 5.16,
+  "load_average_before": 2.01,
+  "load_average_after": 1.93,
   "timing_source": "chrono::steady_clock (C++ internal)",
-  "full_analysis_ms": 1247.05,
-  "full_analysis_with_cancel_callback_ms": 1237.67,
+  "full_analysis_ms": 1152.52,
+  "full_analysis_with_cancel_callback_ms": 1157.80,
   "per_feature_standalone": [
-    {"feature": "STFT", "libsonare_ms": 13.93},
-    {"feature": "Mel Spectrogram", "libsonare_ms": 23.31},
-    {"feature": "HPSS", "libsonare_ms": 99.61},
-    {"feature": "Onset Strength", "libsonare_ms": 23.68},
-    {"feature": "Chroma", "libsonare_ms": 15.61},
-    {"feature": "Beat Track", "libsonare_ms": 57.95},
-    {"feature": "MFCC", "libsonare_ms": 24.05},
-    {"feature": "pYIN", "libsonare_ms": 1644.89},
-    {"feature": "Spectral Centroid", "libsonare_ms": 19.24}
+    {"feature": "STFT", "libsonare_ms": 13.52},
+    {"feature": "Mel Spectrogram", "libsonare_ms": 22.23},
+    {"feature": "HPSS", "libsonare_ms": 81.94},
+    {"feature": "Onset Strength", "libsonare_ms": 22.72},
+    {"feature": "Chroma", "libsonare_ms": 14.78},
+    {"feature": "Beat Track", "libsonare_ms": 54.95},
+    {"feature": "MFCC", "libsonare_ms": 23.01},
+    {"feature": "pYIN", "libsonare_ms": 427.89},
+    {"feature": "Spectral Centroid", "libsonare_ms": 18.12}
   ],
   "per_feature_cached": [
-    {"feature": "Mel Spectrogram", "libsonare_ms": 9.02},
-    {"feature": "Onset Strength", "libsonare_ms": 0.48},
-    {"feature": "Chroma", "libsonare_ms": 1.09},
-    {"feature": "MFCC", "libsonare_ms": 0.92},
-    {"feature": "Spectral Centroid", "libsonare_ms": 2.82}
+    {"feature": "Mel Spectrogram", "libsonare_ms": 8.75},
+    {"feature": "Onset Strength", "libsonare_ms": 0.50},
+    {"feature": "Chroma", "libsonare_ms": 1.07},
+    {"feature": "MFCC", "libsonare_ms": 0.91},
+    {"feature": "Spectral Centroid", "libsonare_ms": 2.86}
   ]
 }