import time


def log(msg: str):
    ts = time.strftime("%Y-%m-%d %H:%M:%S")
    print(f"[{ts}] {msg}", flush=True)


def timed(label, fn, *args, **kwargs):
    start = time.perf_counter()
    result = fn(*args, **kwargs)
    elapsed = time.perf_counter() - start
    log(f"{label} took {elapsed:.2f}s")
    return result, elapsed