Optimize the given Python code to reduce execution time
def calculate_sum(numbers):
    result = 0
    for number in numbers:
        result += number
    return result

numbers = [1, 2, 3, 4, 5]
calculate_sum(numbers)
def calculate_sum(numbers):
    return sum(numbers)

numbers = [1, 2, 3, 4, 5]
calculate_sum(numbers)