如何对递归函数计时？

import time

def recursive_function(n):
    if n <= 1:
        return 1
    else:
        return n * recursive_function(n-1)

start_time = time.time()

result = recursive_function(5)  # 示例中计算5的阶乘

end_time = time.time()

execution_time = end_time - start_time

print("递归函数的执行结果为：", result)
print("递归函数的执行时间为：", execution_time, "秒")