diff --git a/KuznetsovYuM/docs/data/1-st-exercise/phonebook_structures.py b/KuznetsovYuM/docs/data/1-st-exercise/phonebook_structures.py
index 3670595..3087a84 100644
--- a/KuznetsovYuM/docs/data/1-st-exercise/phonebook_structures.py
+++ b/KuznetsovYuM/docs/data/1-st-exercise/phonebook_structures.py
@@ -159,12 +159,120 @@ def bst_collect_inorder(root):
     return result
 
 
+
+
+#Benchmarking
+import random
+import time
+import csv
+import os
+import sys
+
+sys.setrecursionlimit(20000)
+
+def generate_test_data(n, seed=42):
+    random.seed(seed)
+    records = []
+    for i in range(1, n+1):
+        name = f"User_{i:05d}"
+        phone = f"{random.randint(100,999)}-{random.randint(1000,9999)}"
+        records.append((name, phone))
+    return records
+
+def prepare_ordered_and_shuffled(records):
+    shuffled = records.copy()
+    random.shuffle(shuffled)
+    sorted_records = sorted(records, key=lambda x: x[0])
+    return shuffled, sorted_records
+
+def measure_operations(struct_ops, records, mode_name, repeats=5):
+    results = []
+    for rep in range(repeats):
+        ds = struct_ops['create']()
+
+        start = time.perf_counter()
+        for name, phone in records:
+            ds = struct_ops['insert'](ds, name, phone)
+        insert_time = time.perf_counter() - start
+
+        existing_names = [name for name, _ in records]
+        sample_existing = random.sample(existing_names, 100)
+        nonexistent = [f"Missing_{i}" for i in range(10)]
+        search_names = sample_existing + nonexistent
+        random.shuffle(search_names)
+
+        start = time.perf_counter()
+        for name in search_names:
+            struct_ops['find'](ds, name)
+        find_time = time.perf_counter() - start
+
+        to_delete = random.sample(existing_names, 50)
+        start = time.perf_counter()
+        for name in to_delete:
+            ds = struct_ops['delete'](ds, name)
+        delete_time = time.perf_counter() - start
+
+        results.append({
+            'structure': struct_ops['name'],
+            'mode': mode_name,
+            'repetition': rep+1,
+            'insert_time': insert_time,
+            'find_time': find_time,
+            'delete_time': delete_time
+        })
+    return results
+
+def run_full_benchmark():
+    N = 10000
+    base_records = generate_test_data(N)
+    shuffled, sorted_records = prepare_ordered_and_shuffled(base_records)
+
+    structures = {
+        'LinkedList': {
+            'name': 'LinkedList',
+            'create': lambda: None,
+            'insert': linked_list_add,
+            'find': linked_list_find,
+            'delete': linked_list_remove,
+        },
+        'HashTable': {
+            'name': 'HashTable',
+            'create': lambda: hash_table_create(100),
+            'insert': hash_table_put,
+            'find': hash_table_get,
+            'delete': hash_table_remove,
+        },
+        'BST': {
+            'name': 'BST',
+            'create': lambda: None,
+            'insert': bst_add,
+            'find': bst_find,
+            'delete': bst_remove,
+        }
+    }
+
+    all_results = []
+    for name, ops in structures.items():
+        print(f"Benchmarking {name} on random order...")
+        all_results.extend(measure_operations(ops, shuffled, 'random', repeats=5))
+        print(f"Benchmarking {name} on sorted order...")
+        all_results.extend(measure_operations(ops, sorted_records, 'sorted', repeats=5))
+
+    os.makedirs('docs/data', exist_ok=True)
+    csv_path = 'docs/data/experiment_results.csv'
+    with open(csv_path, 'w', newline='', encoding='utf-8') as f:
+        writer = csv.writer(f)
+        writer.writerow(['Structure', 'Mode', 'Repeat', 'Insert (sec)', 'Search (sec)', 'Delete (sec)'])
+        for r in all_results:
+            writer.writerow([
+                r['structure'],
+                r['mode'],
+                r['repetition'],
+                f"{r['insert_time']:.6f}",
+                f"{r['find_time']:.6f}",
+                f"{r['delete_time']:.6f}"
+            ])
+    print(f"Experiment finished. Results saved to {csv_path}")
+
 if __name__ == '__main__':
-    tree = None
-    tree = bst_add(tree, 'Zoe', '111')
-    tree = bst_add(tree, 'Alice', '222')
-    tree = bst_add(tree, 'Bob', '333')
-    tree = bst_add(tree, 'Alice', '444')
-    print(bst_find(tree, 'Alice'))   # 444
-    tree = bst_remove(tree, 'Bob')
-    print(bst_collect_inorder(tree)) # [('Alice','444'), ('Zoe','111')]
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+    run_full_benchmark()
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