import random

count = 100_000

delay = timeit.timeit(
    setup="""
numbers = list(range(10_000))
random.shuffle(numbers)
probe = 7_777
""",
    stmt="""
probe in numbers
""",
    globals=globals(),
    number=count,
)

print(f"{delay/count*1e9:.2f} 나노초")

>>>
13078.05 나노초