python列表连接添加性能测试代码

python列表连接添加性能测试代码

L = [1, 2]
L = L + [3]            # concatenate: slower
print L
L.append(4)            # faster, but in-place
print L
L = L + [5, 6]         # concatenate: slower
print L
L.extend([7, 8])       # faster, but in-place
print L
L += [9, 10]       # mapped to L.extend([9, 10])
print L