Code generated by an OCG compiler may not need to save any registers during an interrupt routine, thereby saving up to 48 cycles that are wasted by a non-OCG compiler.
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- 由OCG编译器产生的代码在中断程序过程中可能不需要保留所有寄存器,因此能够节省非OCG编译器中所浪费的高达48个周期。