In below program I expect test1 to run slower because of the dependent instructions. A test run with -O2 seemed to confirm this. But then I tried with -O3 and now the timings are more or less equal. How can this be?In below program I expect test1 to run slower b
阅读背景：
为什么在使用-O3编译时，这两个循环的运行速度都一样快，而在使用-O2编译时却不一样?
来源：互联网
分享到：
