What seriously limit modern system performance?

Modern Intel processors are

What of the following will not cause any change in processor performance?

What is VTune™ Performance Analyzer for?

Why performance could be increased after the loop distribution?

Why performance is improved when invariant is moved out of the loop?

What could be the reason for loosing performance while processing a big loop?

How structure field reordering could affect the application performance?

System bus used for

What operation system VTune supports?