可是啊lzarconlony1
你給的網頁一開始就寫說用MIPS來測效能可能是最沒用的指標......

第二段就解釋理由,因為兩種晶片執行的低階指令可能完全不同,
你比較他們一段時間內能執行的指令數量是沒用的

文章後面還沒看,有空再看


MIPS (the benchmark):

The processor benchmark called MIPS has nothing to do with the company name. In the context of CPU performance measurement, MIPS stands for 'Million Instructions Per Second' and is probably the most useless benchmark ever invented. The rest of this page concerns MIPS as a benchmark, not the company (also discussed here are the MFLOPS and SPEC benchmarks, plus a comment on memory bandwidth).

The MIPS rating of a CPU refers to how many low-level machine code instructions a processor can execute in one second. Unfortunately, using this number as a way of measuring processor performance is completely pointless because no two chips use exactly the same kind of instructions, execution method, etc. For example: on one chip, a single instruction may do many things when executed (CISC = Complex Instruction Set Computing), whereas on another chip a single instruction may do very little but is dealt with more efficiently (RISC = Reduced Instruction Set Computing). Also, different instructions on the same chip often do vastly different amounts of work (eg. a simple arithmetic instruction might take just 1 clock cycle to complete, whereas doing something like floating point division or a square root operation might take 20 to 50 clock cycles).