64位可执行文件比32位版本运行速度慢

I have a 64-bit Ubuntu 13.04 system. I was curious to see how 32-bit applications perform against 64-bit applications on a 64-bit system so I compiled the following C program as 32-bit and 64-bit executable and recorded the time they took to execute. I used gcc flags to compile for 3 different architectures:I have a 64-bit Ubuntu 13.04 system. I was curi