如果要比较两个分类账,经营者是否会对进行比较所需时间产生影响? 例如:
if (x < 60)
以及
if (x <= 59)
哪一个能够提供最佳业绩,或者业绩差异会忽略不计? 业绩成果取决于语言吗?
我常常发现,我把使用这些经营者混为一谈。 任何想法都会受到赞赏。
即便存在明显差异,我认为汇编者也有足够的智慧来照顾这些事情。 因此,我的建议是利用使《守则》更容易理解的内容,并将微观开发方法留给汇编者。
In the specific example you gave where one side is constant, I d expect an optimizer to transform one to the other if it was significantly faster.
There is almost certainly no difference in performance. For CISC processors, you ll typically have all manner of branch instructions that cope with all the difference < <= > >= etc. On RISC there may be a very small performance difference although I d seriously doubt it!
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