From f5b6f0fc7338eadb180fc264c3fc461458708bdf Mon Sep 17 00:00:00 2001
From: Arity-T <tish.mainmail@gmail.com>
Date: Mon, 15 Dec 2025 14:46:27 +0000
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---
 benchmark.py | 115 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 115 insertions(+)
 create mode 100644 benchmark.py

diff --git a/benchmark.py b/benchmark.py
new file mode 100644
index 0000000..f3e7438
--- /dev/null
+++ b/benchmark.py
@@ -0,0 +1,115 @@
+"""
+Запускает make run <number_of_runs> раз и считает статистику по времени выполнения.
+Тупо парсит out.txt и берём значение из строки "Total execution time: <time> sec".
+
+python benchmark.py <number_of_runs>
+"""
+
+import os
+import re
+import sys
+import time
+import subprocess
+import statistics
+
+N = int(sys.argv[1]) if len(sys.argv) > 1 else 10
+OUT = "out.txt"
+
+TIME_RE = re.compile(r"Total execution time:\s*([0-9]*\.?[0-9]+)\s*sec")
+JOB_RE  = re.compile(r"Submitted batch job\s+(\d+)")
+
+APPEAR_TIMEOUT = 300.0     # ждать появления out.txt
+FINISH_TIMEOUT = 3600.0    # ждать появления Total execution time (сек)
+POLL = 0.2                 # частота проверки файла
+
+def wait_for_exists(path: str, timeout: float):
+    t0 = time.time()
+    while not os.path.exists(path):
+        if time.time() - t0 > timeout:
+            raise TimeoutError(f"{path} did not appear within {timeout} seconds")
+        time.sleep(POLL)
+
+def try_read(path: str) -> str:
+    try:
+        with open(path, "r", encoding="utf-8", errors="replace") as f:
+            return f.read()
+    except FileNotFoundError:
+        return ""
+    except OSError:
+        # бывает, что файл на NFS в момент записи недоступен на чтение
+        return ""
+
+def wait_for_time_line(path: str, timeout: float) -> float:
+    t0 = time.time()
+    last_report = 0.0
+    while True:
+        txt = try_read(path)
+        matches = TIME_RE.findall(txt)
+        if matches:
+            return float(matches[-1])  # последняя встреченная строка
+
+        now = time.time()
+        if now - t0 > timeout:
+            tail = txt[-800:] if txt else "<empty>"
+            raise TimeoutError("Timed out waiting for 'Total execution time' line.\n"
+                               f"Last 800 chars of out.txt:\n{tail}")
+
+        # иногда полезно печатать прогресс раз в ~5 сек
+        if now - last_report > 5.0:
+            last_report = now
+            if txt:
+                # показать последнюю непустую строку
+                lines = [l for l in txt.splitlines() if l.strip()]
+                if lines:
+                    print(f"  waiting... last line: {lines[-1][:120]}", flush=True)
+                else:
+                    print("  waiting... (out.txt empty)", flush=True)
+            else:
+                print("  waiting... (out.txt not readable yet)", flush=True)
+
+        time.sleep(POLL)
+
+times = []
+
+for i in range(N):
+    print(f"Run {i+1}/{N} ...", flush=True)
+
+    # удаляем out.txt перед запуском
+    try:
+        os.remove(OUT)
+    except FileNotFoundError:
+        pass
+
+    # запускаем make run и забираем stdout (там будет Submitted batch job XXX)
+    res = subprocess.run(["make", "run"], capture_output=True, text=True)
+    out = (res.stdout or "") + "\n" + (res.stderr or "")
+
+    job_id = None
+    m = JOB_RE.search(out)
+    if m:
+        job_id = m.group(1)
+        print(f"  submitted job {job_id}", flush=True)
+    else:
+        print("  (job id not detected; will only watch out.txt)", flush=True)
+
+    # ждём появления out.txt и появления строки с Total execution time
+    wait_for_exists(OUT, APPEAR_TIMEOUT)
+    t = wait_for_time_line(OUT, FINISH_TIMEOUT)
+
+    times.append(t)
+    print(f"  time = {t:.3f} sec", flush=True)
+
+    # опционально удалить out.txt после парсинга
+    try:
+        os.remove(OUT)
+    except FileNotFoundError:
+        pass
+
+print("\n=== RESULTS ===")
+print(f"Runs:   {len(times)}")
+print(f"Mean:   {statistics.mean(times):.3f} sec")
+print(f"Median: {statistics.median(times):.3f} sec")
+print(f"Min:    {min(times):.3f} sec")
+print(f"Max:    {max(times):.3f} sec")
+if len(times) > 1:
+    print(f"Stddev: {statistics.stdev(times):.3f} sec")