估计是用了一些SSEx指令吧 还有intel对自己cpu的流水线最清楚，作的比gcc好一点也不奇怪 ----- Original Message ----- From: "Min Xu" <[EMAIL PROTECTED]> To: "Yan, Zheng" <[EMAIL PROTECTED]> Cc: <[email protected]> Sent: Wednesday, March 10, 2004 12:27 PM Subject: Re: GCC
> Yan, Zheng wrote: > > GCC 是跨平台的compiler > > icc 目前来说只支持x86 > > > > 况且，intel说的20%究竟怎么样测的，我们也不晓得 > > ps. kernel 目前不能用icc编译 (至少有些问题没解决，我在intel的朋友告诉我的) > > Usually when measuring performance, people use benchmark suite, such as > SPEC. > The average performance is used to compare two products. I had some > experience with icc. > It made my C program 5% faster and had no noticable difference to my C++ > program. > > That said, I think how good is icc/gcc really depends on _your_ program
