chore: add benchmark analysis scripts

check_nodes.py

@@ -0,0 +1,36 @@
+import csv
+
+def check_nodes(filename, label):
+    nodes_list = []
+    durations = []
+    with open(filename, 'r') as f:
+        reader = csv.reader(f)
+        next(reader)
+        for row in reader:
+            if not row or row[0].startswith('#'):
+                continue
+            try:
+                nodes_list.append(int(row[3]))
+                durations.append(int(row[1]))
+            except:
+                pass
+    
+    print(f"\n=== {label} NODES EXPANDED ===")
+    print(f"Total paths: {len(nodes_list)}")
+    
+    # Group by node count
+    node_buckets = [(0, 0), (1, 64), (65, 200), (201, 500), (501, 1000), (1001, 10000)]
+    for lo, hi in node_buckets:
+        count = sum(1 for n in nodes_list if lo <= n <= hi)
+        pct = 100*count/len(nodes_list) if nodes_list else 0
+        print(f"  {lo}-{hi if hi < 10000 else 'inf'} nodes: {count} ({pct:.1f}%)")
+    
+    # Show duration correlation with nodes
+    print("\nDuration by node count:")
+    for lo, hi in [(1, 64), (65, 200), (201, 500), (501, 1000), (1001, 10000)]:
+        subset_durations = [d for n, d in zip(nodes_list, durations) if lo <= n <= hi]
+        if subset_durations:
+            avg = sum(subset_durations) / len(subset_durations)
+            print(f"  {lo}-{hi if hi < 10000 else 'inf'} nodes: avg {avg:.0f}µs, count {len(subset_durations)}")
+
+check_nodes("pathfinding_benchmark_current.csv", "CURRENT")