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Copyright 2004 David J. Lilja

12

Clock rate

Faster clock == higher performance

1 GHz processor always better than 2 GHz

But is it a proportional increase?

What about architectural differences?

Actual operations performed per cycle

Clocks per instruction (CPI)

Penalty on branches due to pipeline depth

What if the processor is not the bottleneck?

Memory and I/O delays

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